The Planted Tank Forum - View Single Post - Thoughts on Lowering Tank Temps at Night
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post #12 of (permalink) Old 11-07-2019, 04:38 PM
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If anything, I would maintain the "minimum" temperature of the fish's range the whole day and night and then slightly increase to the "maximum" it during the middle of the day combined with the strongest lighting. So say I have rainbows, I'd keep it at 78F at night but increase to 82F when the light is the brightest. This is more realistic but I still don't know if it would actually do anything for most fish, since they are able to freely move between shaded and open water and to warmer or colder waters, usually.
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