Agassiz's dwarf cichlid
Apistogramma agassizii
intermediate careOverview
Agassiz’s dwarf cichlid (Apistogramma agassizii) is one of the most popular South American dwarf cichlids — a small, spade-tailed fish where males blaze in blue, red and gold while females turn bright yellow when guarding fry. It is a harem breeder: one male presides over several females, each holding her own little cave. Compact, characterful and endlessly watchable, it rewards a keeper who can supply soft, warm water and a mature, well-structured tank.
Tank & water
A harem needs at least 75 litres (20 gallons), broken up into multiple small territories.
- Temperature: hold 25–29 °C with a reliable heater.
- Soft and acidic: aim for pH 5.5–6.5 and low hardness. Test with a kit; adjusting water is covered in raising or lowering pH.
- Clean and gentle: a mature filter with soft flow and consistent water changes.
- Aquascape: sand substrate, leaf litter, wood and plenty of small caves — one per female, plus spares.
Feeding
Agassiz’s dwarf cichlids are micro-carnivores. They much prefer small live and frozen foods — baby brine shrimp, daphnia, cyclops, micro bloodworm — though many will also take quality micro pellets. A varied meaty diet brings out colour and breeding condition. Feed small amounts once or twice daily and make sure they aren’t outcompeted by faster mid-water fish.
Tankmates
Keep them with small, peaceful, warm-water dither fish that occupy the upper levels — small tetras and rasboras work well and encourage the shy apistos out. Avoid other bottom-dwelling cichlids that compete for cave space, and any boisterous or nippy tankmates. A single male with his harem is the heart of the tank; check overall stocking with how many fish in an aquarium.
Common mistakes to avoid
- Keeping them in hard, alkaline water they can’t colour up or breed in
- A single pair where the female has nowhere to escape the male
- Too few caves, so females can’t establish separate territories
- Relying on dry food instead of the small live and frozen foods they prefer
For another soft-water dwarf cichlid, compare the German blue ram or the cave-spawning Apistogramma cacatuoides, which is a little more forgiving of water conditions.
Agassiz's dwarf cichlid — frequently asked questions
How should I keep Apistogramma agassizii — pair or harem?
Agassiz's dwarf cichlids are naturally polygamous, so a harem of one male with two to four females works best. Each female claims a small cave territory and the male patrols between them. A single pair can work in a smaller tank, but a lone female may be harassed, so give plenty of caves and sight breaks.
What water do Apistogramma agassizii need?
Soft, warm, acidic water — pH 5.5–6.5, low hardness and 25–29 °C — reflecting their Amazon origins. Hard, alkaline tap water causes poor colour, failed spawns and short lives. Test your source water with a kit first; these are not fish for untreated hard water.
Are Apistogramma agassizii good for beginners?
They suit an intermediate keeper. They are peaceful and rewarding, but sensitive to water quality and need soft, warm, stable conditions and a mature tank. If your cycling and water-change routines are solid and your water is soft, they are a manageable and fascinating dwarf cichlid.
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