I have a 30 gal tank with healthy gray cory adults a man and female. I also had an albino cory that lived to the ripe old age of 12. he had a swollen left eye, but that did not slow him down. he recently died, and I decided to get another albino cory. It has been a nightmare. the first one I got must have had something wrong with it and it died in a few days, and it took 3 of my adult corys with it a day or two later. I did a 90 % water change filters etc. I am now down to my two gray corys. I have done all the stuff I can think of to rectify the situation. I purchased an API kit to make sure my nitrates are ok, and I have purchased Algone to keep the nitrate low. I am closely monitoring the temperature and it is presently at 75 +/- a degree or 2. the sources for the albino corys was Petsmart Petco and Pet supplies plus(7 purchased and died). when my gray corys reproduced, they flourished in the tank, but I cannot get the albino corys to last more than a week. My approach is to try a small 1 gal aquarium with sand for them until they get a little bigger then transfer them to the 30 gal tank. My original albino cory did start in a small tank until I got more fish and a large tank. Any suggestions appreciated !