I just set up a tank for hill stream loaches. It's about 40 gallons and two submergible pumps (combined 1500 gallons per hour) provide some good flow. There is no heater. The problem is that the water temperature in the tank is significantly increased. Are the pumps to blame? Anyone ever had similar problems? Any idea for a solution?
I'd appreciate any response.
What's your tank lid set-up like? If it's closed then that will increase heat retention as well. Lights too.
I don't know if this helps you, but at least you know what the problem is and that lower wattage pumps and/or more heat exchange on the surface is the solution to cooler water temperatures.
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