I have a 120-gallon goldfish tank. My fish tank temperature normally always stays between 68 to 67 degrees. I live where it's cold most of the time and when I do a two-week water change it drops to 63 to 64 degrees.
To let you know I use reverse osmosis and hooked up from a hose outside due to bad water conditions.
Is it okay for the water to drop that cold?
Should I buy a heater just for changing the water?
To let you know I use reverse osmosis and hooked up from a hose outside due to bad water conditions.
Is it okay for the water to drop that cold?
Should I buy a heater just for changing the water?
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