i stumbled across this forum and decided I might drop a line. I bought 3 Spotted cories last night for my tank, and now, less than 18 hours since they were introduced, 2 are dead and the last is very sluggish, and they look like the 2 bled out internally. Any ideas? Before you ask, the tank's ammonia level is 1.0 ppm, and the nitrite level is 0.1 ppm I dont have a nitrate test. pH 7.0 Hardness is 4.