I have 2 albino corydoras and 1 of them has been lying on the bottom of the tank for at least 15 hours now. He's still alive, and I gently moved my net towards his bum to see if he'd move and he did, he swam a tour of the tank and returned to the same spot to lie down. Yesterday I noticed a fungal infection on one of my platies so he's in a separator and I've dosed the tank twice now with 10 ml of Pimafix (20 gallon tank). I also put a total of 1.5 two of Nutrafin Freshwater Aquarium Salt yesterday, having read that that may help fight infections. I read that you should put 1 tsp per 5 gallons or something but I didn't want to risk anything and I know that corys are sensitive to salt. My other cory is still happy as can be and even came and snuggled the other one for an hour or so. I'll only be getting a new test kit on Monday to check my parameters, but my ph hasn't changed and my ammonia reads as "safe" on the Seachem Ammonia Alert.