Winter is Coming...

Keep fish that don't mind being cold in the winter.
 
I keep goldfish and a variety of other fish in other tanks. Half of the goldfish died last year. They are cold water fish and could not take the 20* drops. Few fish could, cold water or topical.

I'm looking for a way to alter the 40* water without breaking my back or killing my fish. I am very attached to mine and I know how bad pet stores are. If I give my fish away to start over, they will die there.
 
I do 50% weekly changes all winter long and I never add hot water. It just takes a little while longer to refill in the winter. Or you could equip your tanks with overflow, plumb the overflows right down a drain, and trickle a small amount in continuously.
 
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