Red turquoise discus fish are one of our best selling strains. These discus have a perfect shape and a wonderful horizontal, red striation coloring. Discus are shoaling fish and do best in groups of 5 or more. A general rule for stocking discus is 10 gallons of water per 1 adult fish. So you need at least a 50 gallon aquarium to adequately house your shoal of discus.