That'll do it! They are such pigs, sometimes you get one that just won't leave the tabs alone till it eats the whole thing and blows up. What I do now is place them in the bushy plants after the lights go out. I have one royal blue albino that I need to keep away from the algae tabs. She tries to find it with the night light on in the room at night but they are not so successful with them broken, then hidden in the thick crypts. I had one discus that blew herself up regularly, I'd treat her with epsom salts, she'd purge, and do it again. I lost her eventually. Flakes are fine, and even shrimp pellets don't seem to cause a problem cause they take on water instantly. The algae wafers are designed to either not dissolve or dissolve very, very slowly.