Apistogramma Macmasteri
Apistogramma macmasteri
A colourful red-and-blue South American dwarf cichlid for soft-water tanks.
| Difficulty | Intermediate |
| Min. Tank Size | 75 L |
| Temperature | 23.0–28.0 °C |
| pH Range | 6.0–7.5 |
| Max Size | 8.0 cm |
| Lifespan | 3-5 years |
| Diet | Carnivore |
| Temperament | Peaceful |
Overview
The Apistogramma Macmasteri (Apistogramma macmasteri) is a colourful red-and-blue South American dwarf cichlid for soft-water tanks. It is a popular choice among Australian aquarists, reaching around 8 cm and living roughly 3-5 years when properly cared for.
This complete guide covers how to keep the Apistogramma Macmasteri successfully - tank size and setup, water parameters, the best foods (including recommended brands), suitable tank mates, breeding, sexing and the health issues to watch for. It is rated Intermediate to care for.
Natural Habitat & Origin
This cichlid comes from the warm rivers, lakes and floodplains of the Americas or Africa, where it forms territories and shows complex, intelligent behaviour. A stable, well-aquascaped tank with the right hardscape brings out its best.
Matching the temperature, water chemistry and cover a species evolved with is the simplest route to keeping it healthy and seeing its natural behaviour and colour.
Tank Size & Aquarium Setup
Provide a minimum of 75 litres for the Apistogramma Macmasteri. A roomy, well-decorated tank lets a pair settle and behave naturally.
Use sand or fine gravel with rocks, caves or driftwood to create territories and sight-breaks, which dramatically reduces aggression.
Always add fish only to a fully cycled, mature tank with stable biological filtration. Match filtration generously to the fish's size and waste output.
Water Parameters
Keep the Apistogramma Macmasteri in stable water at 23-28 °C with a pH of 6.0-7.5. It adapts to a moderate range, so stability matters more than an exact figure.
Test regularly: ammonia and nitrite must read zero, and nitrate should be kept low with routine partial water changes. Always dechlorinate and temperature-match new water, because sudden swings cause far more illness than water that is stable but slightly imperfect.
Diet & Feeding
The Apistogramma Macmasteri is a carnivore and needs a protein-rich, meaty diet.
In Australia, good options include Hikari Carnivore/Massivore pellets, API Carnivore food and Dymax frozen bloodworm, brine shrimp, krill and mussel. Feed small amounts once or twice a day (only what is cleared in a minute or two), vary the diet for the best colour and health, and avoid overfeeding, which is the leading cause of poor water quality.
Temperament & Tank Mates
The Apistogramma Macmasteri is peaceful and community-friendly. It mixes well with other calm species that share its temperature (23-28 °C) and pH (6.0-7.5) needs, are too large to be eaten and not large enough to eat it.
Breeding
The Apistogramma Macmasteri is a cave spawner. Provide a snug cave or pipe; the male guards and fans the eggs until the fry are free-swimming.
Even if you are not planning to breed it, recognising this behaviour helps you understand what you are seeing and respond well - for example by adding cover for fry or giving a guarding pair extra space.
How to Tell Males from Females
Males are often larger with longer, more pointed fins and brighter colour; females are smaller and rounder, and many show clear breeding colours when paired.
Common Health Problems
Like most aquarium species it can suffer from white spot (ich), fin rot and fungal or bacterial infections, almost always triggered by stress or poor water quality. Quarantine new arrivals for 2-4 weeks and watch daily for early signs such as loss of appetite, unusual hiding, clamped fins or laboured breathing - caught early, most issues are very treatable.
Prevention beats cure: keep water pristine, avoid overstocking and overfeeding, quarantine new arrivals, and act at the first sign of trouble.
Is the Apistogramma Macmasteri Right for You?
The Apistogramma Macmasteri suits keepers with some experience and a stable, mature, appropriately sized tank, as long as you can provide at least 75 litres, water at 23-28 °C and pH 6.0-7.5, the right diet and suitable tank mates.
Meet those needs and the Apistogramma Macmasteri will reward you for around 3-5 years. Use our free aquarium calculators to plan your setup, and explore our other fish, plant and disease guides to build a thriving aquarium.