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Live Chaetomorpha Chaeto Macroalgae
Natural nutrient export for any refugium
- Fast-growing macroalgae that pulls nitrate and phosphate from the water
- Forms a dense, tangled mass that's easy to harvest
- Provides habitat for copepods and amphipods
- Thrives under a basic refugium light on a reverse cycle
- Helps stabilize pH by consuming CO2 during photosynthesis
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Pros
- Excellent natural nutrient export for reef and fish-only tanks
- Boosts pod populations as a living food source
- Does not go sexual or crash like some other macroalgae
- Simple to trim and remove excess growth
- Supports more stable pH on a reverse light cycle
Cons
- Needs a refugium or display space with dedicated lighting
- Can trap detritus if water flow through it is too low
- May arrive with hitchhikers that require a quick rinse
- Requires periodic harvesting to keep nutrient export effective
At a glance
Natural nutrient export for any refugium
Chaeto is the workhorse macroalgae of the reef hobby, quietly stripping nitrate and phosphate while cultivating the pods that feed your tank.
- Fast-growing macroalgae that pulls nitrate and phosphate from the water
- Forms a dense, tangled mass that's easy to harvest
- Provides habitat for copepods and amphipods
- Thrives under a basic refugium light on a reverse cycle
- Helps stabilize pH by consuming CO2 during photosynthesis
Product Specifications
- Light requirement
- Moderate refugium light
- CO2
- Not required
- Placement
- Refugium or sump
- Growth rate
- Fast
- Difficulty
- Easy
- Function
- Nutrient export
Why we recommend the Live Chaetomorpha Chaeto Macroalgae
Anyone who has run a refugium knows the value of chaeto. This stringy green macroalgae grows quickly under modest light, and as it grows it consumes the nitrate and phosphate that otherwise feed nuisance algae in the display. Harvesting a handful every couple of weeks physically removes those nutrients from the system, which is about as natural as filtration gets.
Unlike caulerpa, chaeto doesn’t go sexual and crash, so it won’t dump nutrients back into your water overnight. Its dense tangle also becomes a nursery for copepods and amphipods, seeding your tank with live food that mandarins, wrasses, and corals all appreciate. Running it on a reverse light cycle, opposite the display, helps buffer the natural pH swing that happens overnight.
Who it’s for
This is for reef keepers and fish-only hobbyists who want a low-tech, biological approach to controlling nutrients. You’ll need a refugium, sump section, or display corner with a dedicated grow light and reasonable flow passing through the mass. Give it a rinse on arrival to dislodge any hitchhikers, settle it where water moves freely, and let it do its quiet work. As a bonus, the thriving pod population it supports often does more for finicky fish than any bottled supplement.
The Bottom Line
Chaeto is the workhorse macroalgae of the reef hobby, quietly stripping nitrate and phosphate while cultivating the pods that feed your tank. Drop a ball into a lit refugium and it becomes one of the cheapest, most effective filtration upgrades you can make.
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Frequently Asked Questions
What does chaeto actually do for my tank?
It absorbs nitrate and phosphate as it grows, so harvesting it exports those nutrients and starves nuisance algae in your display.
Does it need special lighting?
A moderate refugium grow light is enough. Many keepers run it on a reverse cycle to help stabilize pH overnight.
Will it crash like other macroalgae?
No. Chaeto doesn't go sexual the way caulerpa can, which makes it far more stable and predictable.
How often should I harvest it?
Trim it whenever the mass roughly doubles, typically every one to three weeks, to keep nutrient export effective.
Will it bring pests into my tank?
It can carry harmless pods plus the occasional hitchhiker. A quick rinse in saltwater before adding it minimizes any surprises.