For planted tanks, choose Amano shrimp for steady hair-algae grazing. For a ready-made mix, buy ReefCleaners' Crews. For large, rapid blooms use a Sea Hare only as a short-term 'nuclear' fix. For persistent rock/algae issues, consider Lawn Mower Blenny or Emerald Mithrax/emerald crabs; Trochus/Astrea snails suit general surface cleaning.
The best cleanup crew (CUC) for hair algae depends entirely on whether your tank is saltwater (reef) or freshwater (planted) . Hair algae ( filamentous algae) can get out of hand quickly, and while cleanup crews will graze on it, they are most effective when the hair algae is short or soft, combined with manual removal.
For Saltwater / Reef Aquariums
Pre-made packages (like those from Reef Cleaners Packages ) typically mix grazers and detritivores, but specific heavy hitters target hair algae.[1][2]
Emerald Crabs (Mithraculus sculptus) : Widely considered one of the best crustacean choices for hair and bubble algae. They have specialized claw tips designed to pluck filamentous algae.
Turbo Snails (Turbo sp.) : Absolute lawnmowers for hair algae. Large species like Mexican Turbos can clear thick patches fast, though they can knock over loose rocks or corals.
Hermit Crabs (Blue Leg / Scarlet Reef) : Excellent general scavengers that squeeze into tight crevices where snails can't reach, picking at the base of hair algae tufts.[1]
Tuxedo or Longspine Urchins : While not technically in standard "snails-and-crabs" packages, urchins will bulldoze through practically any algae, including stubborn hair algae.
For Freshwater / Planted Tanks
If you have a freshwater green fuzz or hair algae problem, standard "community fish" won't touch it. You need dedicated filamentous algae eaters:
Amano Shrimp (Caridina multidentata) : The gold standard for freshwater planted tanks. They must be kept in a group (at least 3–5 depending on tank size) to make a noticeable dent, but they will actively pick at and consume hair algae constantly.
Siamese Algae Eater (Crossocheilus oblongus) : One of the few fish that reliably eats green hair algae and black beard algae, especially when they are younger and active. (Make sure you get the true SAE, not a Flying Fox or False SAE).
Nerite Snails : Great for flat surfaces and rocks, though they prefer other algae types over long, dense hair algae, they help mop up the secondary film algae.
To give you the exact numbers or point you to the right setup, let me know:
Is your aquarium saltwater/reef or freshwater/planted?
What is the tank size (in gallons or liters)?
ChatGPT Search· Sep 20, 2026
If you mean a saltwater reef tank, I’d build the cleanup crew around dedicated hair-algae grazers, rather than buying a generic “cleanup crew” package. Trochus, Turbo, and tuxedo urchins are among the more useful choices for established green hair algae.
A good hair-algae package
For a typical mixed reef, I’d look for:
Trochus snails — the foundation of the crew; good rock/glass grazers and able to right themselves if overturned.
1–2 Turbo snails — particularly useful when the hair algae is thick. They are powerful grazers, but larger individuals can bulldoze loose corals/frags.
When battling a nuisance hair algae outbreak in a saltwater/reef aquarium, pre-packaged cleanup crew (CUC) kits (like those from Reef Cleaners ) are a popular choice. However, no single package is a magic bullet because hair algae can quickly outgrow the appetite of standard snails and crabs if underlying nutrients (phosphates and nitrates) are high.[1]
An effective, targeted cleanup crew package for hair algae should combine specialized grazers that actively eat filamentous hair algae, rather than just general detritivores.
Google AI Mode· Sep 12, 2026
When tackling a nuisance Green Hair Algae (GHA) outbreak in a marine/reef aquarium, standard cleanup crew (CUC) packages aren’t always specialized enough. A proper hair-algae-busting crew relies on heavy-duty grazers that actively eat filamentous algae, rather than just sand- sifters or film-grazers.
The best approach is a curated package featuring specific powerhouse herbivores:
Turbo Snails (such as Turbo fluctuosa ) - Widely considered the absolute best snail for hair algae; they have a massive appetite and will mow down long strands, though they can accidentally flip themselves over.
Pincushion Sea Urchin (Lytechinus sp. ) - A 24/7 grazing machine that relentlessly eats filamentous hair algae right down to the rockwork. (Note: Ensure your rockwork is stable, as urchins can knock loose corals around).
Trochus or Astrea Snails - Excellent secondary grazers that clean the rocks and glass, keeping short patches of hair algae from getting a foothold.
ChatGPT Search· Sep 12, 2026
Assuming this is a saltwater/reef aquarium, for a genuine hair-algae outbreak I’d prioritise Turbo + Trochus snails, rather than buying a generic “cleanup crew” packed with sand scavengers.
Reef Janitor Pack / Clean Up Crew - Medium
£69.99
5 Turbo Snails, 5 Nassarius Snails & More
£69.95
Multi Pack Clean Up Crew Box 1
£49.95
Reef Janitor Pack / Clean Up Crew - Large
£99.99
🥇 What I'd choose
For hair algae specifically:
Turbo snails: the heavy hitters. They're particularly effective against filamentous/hair algae.
Trochus snails: excellent general-purpose grazers for rock and glass, and unlike Astraea they can right themselves if they fall.
Dealing with a nuisance hair algae outbreak can be frustrating, but the right cleanup crew (CUC) combined with nutrient control can make quick work of it. When targeting filamentous hair algae, standard "general cleanup" packages often fall short because many scavengers prefer diatoms or film algae.[2]
An effective, targeted hair algae cleanup crew focuses on heavy-hitting grazers:
If you mean a saltwater/reef aquarium, I’d favor a diverse crew rather than simply buying the largest possible snail count.
Best setup for hair algae
My first choice would be a mix centered around:
Trochus snails — excellent rock/glass grazers and useful against hair algae.
Turbo snails — particularly strong grazers for established hair algae.
Emerald/Mithrax crab — can help with hair algae and other tougher macroalgae.
— good complementary grazers and detritus cleanup.
Google AI Mode· Sep 4, 2026
When battling a nuisance hair algae outbreak, relying solely on a cleanup crew (CUC) is a temporary fix—the ultimate solution requires addressing underlying nutrient levels (nitrates and phosphates). However, the right combination of livestock can dramatically beat back and control the current carpet of hair algae.
Assuming you are dealing with a marine/reef aquarium (where hair algae outbreaks are most notorious), the ideal custom cleanup crew package focuses on heavy grazers:
The Ultimate Hair Algae Cleanup Crew Lineup
Mexican Turbo Snails (Turbo fluctuosus): Widely considered the heavy lifters for hair algae. They are large, voracious, and will bulldoze through thick patches of filamentous algae. (Note: Because they are clumsy and strong, secure your loose rockwork/frags!)
Tuxedo or Pincushion Urchins (Tripneustes / Mespilia): Absolute eating machines. An urchin will systematically graze down hair algae right to the bare rock. They don't mind long strands and will wander over everything.
Lawnmower Blenny (): If your tank size is 30 gallons or larger, this fish is the poster child for hair algae control. Their comb-like teeth scrape down fuzzy turf and hair algae with incredible efficiency.
Sources AI cites
56% of citations to these sources link to brands' own websites.
1 tuxedo urchin — excellent for heavier growth on rockwork. Secure loose frags and rock because urchins can move things around.
A few Cerith snails — useful for algae and detritus around the rock/sand interface.
Hermits only if you want them — they can help with algae and scavenging, but they may kill or evict snails for shells, so provide empty shells.
I wouldn't make Nassarius snails a major part of a hair-algae package. They're excellent scavengers, but they're primarily meat/detritus eaters rather than hair-algae grazers.
The important caveat: a CUC won't fix the underlying cause of a persistent outbreak. Manually pull/siphon the long strands while the grazers work on what's left, and address excess nutrients and/or poor flow. BRS specifically recommends the pinch-and-siphon approach for established long hair algae.
If you tell me your tank size (gallons), whether it's reef or fish-only, and whether the algae is green hair algae or something like bryopsis, I can give you an exact CUC package and quantities.
Trochus snails — excellent for rock and glass, particularly the shorter algae that remains after the Turbos mow down the long stuff. They can also right themselves if knocked over.
Tuxedo urchin — my favorite upgrade if the outbreak is substantial. They can strip algae from rockwork very effectively. Make sure your rockwork is stable because urchins can move things around.
Cerith snails — useful supporting grazers for hair/film algae and detritus, especially around the substrate.
Nassarius snails — not a hair-algae solution; add these only if you also need sand-bed/detritus cleanup.
I wouldn't buy a package loaded with hermits, Nassarius, or cleaner shrimp specifically to solve hair algae. You want your money going toward actual herbivores.
A good example of the type of mixed package I'd look for is reefcleaners.org, but I'd modify the stocking depending on your tank size rather than blindly buying the package.
Most important: manually pull/siphon the long algae first, then let the grazers keep the new growth suppressed. A CUC won't compensate for an ongoing nutrient/light problem; even BRS recommends treating the cleanup crew as part of the maintenance strategy rather than the entire solution.
If you tell me your tank gallons, reef vs fish-only, and whether you have a sand bed, I can give you an exact CUC package (e.g. “4 Turbos + 6 Trochus + 1 urchin”) sized for your tank.
Instead of relying solely on a generic "mixed" package, a custom or specialized package should include these key heavy-hitters:
Tuxedo Urchins (Red or Blue/Tuxedo) or Pincushion Urchins: Widely considered the absolute best biological weapon for hair algae. They will literally mow down patches of hair algae like a lawnmower, cleaning rocks down to bare calcium carbonate.
Turbo Snails (Mexican Turbo): Powerhouse grazers that consume massive amounts of hair algae. Note: They are large and clumsy, meaning they can knock over loose corals, but their appetite for filamentous algae is unmatched.
Cerith Snails (Florida or Dwarf Cerith): Great multi-taskers that get into tight crevices on the rocks where hair algae loves to anchor.
Trochus Snails: Excellent rock-crawling grazers that actively target micro and macro/hair algae, and unlike some other snails, they can right themselves if they fall upside down.
Scarlet Reef Hermit Crabs or Blue Leg Hermit Crabs: While snails do the heavy lifting on long strands, hermits will pick at the base and graze on detritus trapped within the algae tufts. Keep spare empty shells in the tank to prevent them from killing your snails for housing.[1]
A Warning on Pre-Made "All-Algae" Packages
Many standard commercial CUC packages dilute the cleaning power by including massive quantities of sand-sifting or detritus-eating snails (like Nassarius) that do not eat hair algae . If you order a pre-made package, ensure it is heavy on grazers (turbos, trochus, urchins) rather than general scavengers.[1]
The Golden Rule
Inverts will help control and trim the outbreak, but they are processing the algae into waste. To truly beat hair algae, you must pair your cleanup crew with nutrient export:
Manual removal (brushing and siphoning out as much as you can during a water change).
Reducing phosphate and nitrate inputs (feeding less, upgrading your skimmer, or running GFO/macroalgae refugium).
To help tailor this, what is the size of your aquarium and do you have corals or just fish right now? I can recommend the exact headcounts or suggest a fish addition (like a lawnmower blenny or foxface) if your tank size allows it!
Blue Leg or Scarlet Reef Hermit Crabs - Great omnivorous scavengers that pick at the base of hair algae mats and get into tight crevices where snails can't reach.
Lawnmower Blenny or Tang (Tank-Size Dependent) - If your aquarium size permits, adding a vertebrate herbivore like a Lawnmower Blenny (Salarias fasciatus ) or a Yellow Tang/Bristletooth Tang will drastically accelerate hair algae reduction.[1][2]
Pro-Tips for Eradication
Manual Removal First: Physically scrub or pull out as much hair algae as you can outside of a water change before adding the CUC. Overgrown hair algae can overwhelm a clean-up crew or trap detritus.
Address the Root Cause: Algae only grows if there is an excess of nutrients (NO₃ and PO₄) combined with light. Use options like a refugium with Chaetomorpha or GFO/biopellets to export the underlying nutrients, or your cleanup crew will only treat the symptom, not the source.
To help me recommend the exact quantities and safest species mix for your setup, tell me:
What is the total water volume of your aquarium?
Do you have corals or large rocks that an urchin might knock over?
Have you tested your current nitrate and phosphate levels?
A few Ceriths: useful supplementary grazers/scavengers, particularly around the substrate.
Emerald crab: worth considering if you also have bubble algae; it can help with hair algae too, but I'd regard it as optional rather than the core of the crew.
I wouldn't buy a huge CUC package just because it says it's rated for your tank volume. Once the hair algae disappears, an oversized crew can run out of food and starve.
My ideal outbreak package would therefore be roughly: 1 Turbo per ~100 L + several Trochus + a smaller number of Ceriths, adjusted downward for a lightly stocked/new aquarium. Practical Fishkeeping similarly recommends about one large Turbo per 100 L because of their size and appetite.
One important caveat: the CUC treats the symptom, not the cause. For a serious outbreak, manually pull/siphon as much hair algae as possible and address excess nutrients/lighting/flow at the same time; even the better CUC guides stress that these animals don't replace husbandry.
If you tell me your tank volume (litres/gallons), whether it's reef or fish-only, and whether the algae is long/stringy or short turf-like, I can give you an exact CUC and point you to the best UK package currently available.
Trochus snails — excellent rock/glass grazers and particularly useful for keeping the algae from coming right back.
Tuxedo urchin — excellent choice if the outbreak is substantial; they can mow down established hair algae from rockwork.
A few scarlet/blue-leg hermits — useful for picking through crevices, but I wouldn't make hermits the centerpiece.
Cerith/Nassarius snails — good complementary cleaners for detritus and the sandbed, but they're not your primary hair-algae solution.
If you want an actual pre-built package, Reef Cleaners' Diverse Crew packages are one reasonable starting point because they combine Trochus, Turbo, Cerith, hermits, etc., and specifically target hair algae.
The biggest caveat: don't simply buy the largest package available. A CUC can't sustainably eat an enormous algae bloom after you've cleared it. Manually pull/siphon the long hair algae first, then let the grazers handle the regrowth while you address the underlying nutrient/flow issue.
If you tell me your tank size (gallons), whether it's reef/FOWLR, and what livestock you already have, I can give you an exact CUC package/count rather than a generic recommendation.
Turbo Snails (Mexican Turbo Snails): Widely considered the absolute best snail for hair algae. They are voracious eaters and will bulldoze through thick patches of hair algae. (Aim for roughly 1 per 10–15 gallons, as too many can starve once the algae is gone or knock over loose rockwork).
Pincushion or Tuxedo Urchins: An absolute powerhouse for 24/7 rock grazing. They literally mow down hair algae right down to the rock face. Note: They will also eat coralline algae and can carry loose frags like "hats". [1]
Astrea or Nerite Snails: Excellent secondary grazers that get into smaller crevices on the rockwork where larger turbo snails can't fit.
Emerald Crabs (Mithrax): Hit-or-miss with long hair algae, but they will actively pick at shorter filamentous algae and bubble algae. Keep them fed so they don't eye your corals.[2]
Long-Term/Extreme Option — Sea Hare (Aplysia): If the outbreak is massive and out of control, a Sea Hare is a nuclear-level hair algae consumer . However, they have a short lifespan in home aquariums and will starve once the hair algae is gone, so they are best rented or passed along to another hobbyist afterward.
Pre-Made vs. Custom Packages
Many online vendors (like Reef Cleaners ) offer standardized "All Algae" or custom cleanup packages. However, pre-made packages often heavily pad the numbers with Nassarius snails or detritivores that do not eat hair algae.[1][2][3]
If you order a package, it is best to customize it or supplement it heavily with extra Turbo Snails and an Urchin.[2]
Pro-Tip for Success
If your hair algae is very long and mature, cleanup crews will often ignore it until it is manually managed. Do a large manual removal (scrubbing rocks in a bucket of old tank water or siphoning out clumps) first, then let your new cleanup crew keep the regrowth short and under control.
If you share your tank size and current parameters/filtration setup , I can help you tailor the exact numbers for your cleanup crew and address the root nutrient cause (like phosphates or nitrates).
Nerites — mainly useful for film/algae on hard surfaces.
Nassarius snails — useful scavengers, but not hair-algae eaters, so don't buy a bunch of these specifically for the outbreak.
A current example is Reef Cleaners' Diverse Crew, which combines Trochus, Turbo, Emerald crabs, Ceriths, Nerites, Astraeas, hermits, and Nassarius; their 60-gallon package is specifically marketed for hair algae and other nuisance algae.
For a serious outbreak, though, manually remove the bulk of the algae first—pull/siphon it out during a water change—then let the CUC maintain the cleaned areas. A cleanup crew usually won't magically defeat a large, established infestation by itself.
If you tell me your tank size (gallons), reef vs. fish-only, and what livestock you already have, I can give you an exact CUC package/count and tell you which animals I'd skip.
Scarlet Reef or Blue Leg Hermit Crabs (Clibanarius/Paguristes): Excellent scavengers that pick into tight crevices where snails and fish can't reach, grazing on short hair algae and leftover detritus.
Tangs or Rabbitfish (For larger systems, 75+ gallons): A Yellow Tang, Bristletooth Tang , or a Foxface/Rabbitfish can make short work of macroalgae and hair algae.
Pre-packaged vs. Custom Assembly
While many online vendors sell generic "All Algae" or "Reef Cleaner" packages (typically featuring a mix of Nassarius, Cerith , and Nerite snails plus basic hermits), pre-made packages are rarely aggressive enough for a true hair algae infestation . Standard snails prefer glass and film algae over long, coarse hair algae.[1]
To beat hair algae, customize your package to heavily weigh-in on Mexican Turbo Snails , an Urchin , and a Lawnmower Blenny (if space permits).
To help tailor this to your exact setup, could you tell me:
Is your tank freshwater or saltwater?
What is the total water volume (gallons/liters) of your aquarium?
