what size is that tank, I'm thinking the "mystery illness" was nitrite/ammonia poisoning, especially if its a new tank. goldfish are super d"dirty " fish when it comes to the poop they release, it has a ton of ammonia in it.
Agreed! Your bio overload can and will cause "disease" (ammonia poisoning) and kill your fish. I surprised any survived the spike. Very nice looking tank, just way overstocked to begin with.
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Last edited by Tdon1md; 08-22-2011 at 01:29 PM.