03-25-2007, 12:35 PM
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Ok well first you need to find a large coldwater fish that the goldies wont eat. But the problem is you dont have enough room for a large coldwater fish. Ideally you need to keep the temp in the 60's for the goldies to thrive, anything more than 75 gives oxygen deprivation and will lead to an early death for the goldfish. You simply cant fit any fish here, my goldfish rule is 2 goldies for a 30 gallon tank and 10 gallon per goldy after that. An 8" fish in a 10 gallon tank doesnt seem appealing.