OK, so, i have amzingly had this pair of feeder goldfish for about 7 years now and ive never heard of that before. Anyways, i have them in a five gallon tank along witha pleco and they seem to be doing fine. I have been thinking about getting two new 10 gallon tanks and ptting them in one tank possibly with one other compatible fish and then putting a pleco, an aquatice frog, and a newt in the other. I was wondering if anyonw had any suggestions for one more fish to put in with the frog, newt and pleco. PLEASE all of your posts will be greatly appreciated.