Seachem Zooplankton

250ml

$19.80

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Pack size

250 mL

Cost per litre treated

Under 1c

Water type

Marine

Protein / fat

2% / 0.35%

Food form

Liquid concentrate

Suits

LPS and SPS corals

Dose

5 mL per 200 L, twice weekly

Particle size

12.5 to 500 µm

Contains

Krill, Artemia, rotifer

Seachem Zooplankton

$19.80

Sold Out

A concentrated blend of marine zooplankton for filter-feeding corals. Seachem Reef Zooplankton combines krill, brine shrimp and rotifer in particle sizes from 12.5 to 500 µm, sized to suit LPS and SPS corals, clams and other filter-feeding invertebrates in a reef aquarium. It's dosed straight into the water column as a blanket feed rather than spot-fed to individual polyps, and is stocked here in 250 mL and 500 mL bottles.

Key features

Multi-species zooplankton blend – krill (Euphausia Pacifica), Artemia and rotifer cover a range of particle sizes in one bottle.
12.5–500 µm particle range – feeds smaller-mouthed polyps and larger filter feeders from the same dose.
Natural astaxanthin – a carotenoid pigment that supports coral colouration alongside nutrition.
Blanket-feed dosing – designed to be added with pumps running, not spot-fed with flow paused.
Shelf-stable – refrigeration after opening is recommended but not required.

Specifications

Spec	Detail
Type	Concentrated marine zooplankton coral food
Sizes stocked	250 mL, 500 mL
Particle size range	12.5–500 µm
Dose	5 mL (1 capful) per 200 L, twice weekly or as required
Water type	Marine / reef
Storage	Refrigerate after opening – recommended, not required

Ingredients

Water, sodium chloride, acetic acid, Euphausia Pacifica (krill), Artemia, rotifer, ascorbic acid, citric acid, astaxanthin.

Guaranteed analysis	Value
Protein (min)	2.0%
Crude fat (min)	0.35%
Crude fibre (max)	0.5%
Moisture (max)	96.0%
Ash (max)	1.5%

Dosage and directions

Shake before use. Add 5 mL (one capful) per 200 L of tank water, twice weekly, or more often if corals are actively feeding well. Disperse it around the tank with the return pump running so it reaches polyps as a blanket feed – pausing flow to spot-feed concentrates the dose on individual corals and can stress coral tissue rather than help it.

Suitable for, and not suitable for

Suitable for: reef aquariums with filter-feeding corals (LPS and SPS), clams, feather dusters and other filter-feeding invertebrates.
Not suitable for: freshwater aquariums, or as a sole diet for fish – it's formulated for filter feeders, not as a fish flake or pellet replacement.

Goes well with

Seachem Phytoplankton – a finer, plant-based blend for clams and smaller filter feeders that Zooplankton's larger particles don't reach.
Seachem Reef Complete – trace elements and vitamins that support the same coral growth this feed is targeting.
Seachem Reef Plus – a vitamin and amino acid supplement many reefers dose alongside a regular feeding routine.

Warranty and delivery

Seachem Reef Zooplankton doesn't carry a separate manufacturer warranty – as a consumable, it's covered by the consumer guarantees under Australian Consumer Law. It ships as a standard parcel item; refrigeration is recommended after opening, but the product doesn't require cold-chain freight to reach you.

Common questions

What's the difference between Reef Zooplankton and Reef Phytoplankton?

Zooplankton is the animal-based blend – krill, brine shrimp and rotifer – sized for corals and larger filter feeders. Phytoplankton is the plant-based blend, with finer particles suited to clams and smaller filter feeders. Many reef keepers dose both on a rotation.

How often should I dose it?

Seachem's directions call for 5 mL per 200 L twice weekly, or more often where corals are visibly feeding well and water quality allows it.

Do I need to turn my pumps off to feed?

No. It's designed to be dosed as a blanket feed with pumps running. Turning pumps off to target-feed concentrates the dose on individual polyps and can stress coral tissue rather than help it.