Tetra Pro Colour Multi-Crisps Tetra Pro Colour Multi-Crisps – An advanced daily diet for all tropical fish. Concentrated Colour Crisps contain additional carotenoids to promote stunning natural colouration. Improved digestibility delivers better nutrition compared to flakes and the low heat process preserves more essential nutrients. Nitrogen and phosphorus production is reduced helping to control algae as well as a reduction in solid waste making the aquarium easier to maintain. Feed several times a day in small portions.