A.D.P. Super R Red Color Enhancer Fish Food 50g. by fish4you A very special high protein granular food added with high concentration of PSB and Astaxanthin, fomulated to enhance red color on all kinds of fish which has red color base. PSB will bringout every other color as well, however, the outstanding deep red given by this food is more accepted by all fish hobbyist. Every fish color improvement will be noticed within 7 days. This food is most suitable for small size fish such as tetras,rasboras, guppies, and all kinds of small red color fish.