Mysterious Deaths… goldfish, toxicity?
Hello Again, I will try the PolyFilter, I have a spare pad or two somewhere in my house (far too much fish stuff in one apartment). And regarding the changes to the tank, I haven’t really added anything within the last month, the driftwood has been there for about 5 months, plus my tank has a almost complete cover, but it does leave a slit across the back open. Maybe something got in that way.