[stephanie]

I had 9 julii Cory cats in my 46 g and over the past 2 weeks I've lost 4 of them. They all behave the same way.. Laying upside down or sideways on the floor and then when they swim it's done poorly and upside down. They all seem fine until then, scurrying about looking for food. No other fish deaths.. Just the Cory's. Any ideas what's causing this and how I an prevent my other ones from dying?

Thanks as always!