Diamond Blue Discus

Diamond blue discus, or blue diamond discus, were developed by Jack Wattley in the United States in the 1960s and became popular in the aquarium trade in the 1980s. Blue diamond discus are solid cobalt blue and often feature red eyes. The blue diamond discus, as opposed to the cobalt blue discus, do not have black markings on the body. Like all our tank-bred discus, AquariumFish.com imports from a terrific breeder in Singapore.

Quick Facts

Care Guide

Tank setup: Give them a reliable heater, gentle but strong filtration, and a bare bottom or fine sand for easy cleaning. Keep the tank in a quiet spot. Discus need very clean water.

Feeding: Feed small meals of quality discus pellets or granules a few times a day, and remove uneaten food within a few minutes, since leftovers quickly foul the water. They also enjoy frozen foods like bloodworms and brine shrimp. New arrivals may need frozen food for a while before they accept pellets.

Tankmates: Discus are calm and shy, so choose gentle tankmates that enjoy the same warm water: cardinal and rummynose tetras, sterbai corydoras and small plecos are popular choices. Avoid fast, boisterous or fin-nipping fish, and anything that competes hard for food. Many keepers avoid angelfish, which can bully discus and share diseases.

Living in groups: Discus are social and feel safest in a group. A single discus, or just two, tends to be stressed. When a pair forms to breed, they may claim part of the tank, so a group spreads out the attention.

Good to know: Blue discus look most vivid under full-spectrum lighting and against a dark background. Discus show stress by darkening their color and hiding. A dark discus in a corner usually means the water quality or tankmates need checking.