That aquascaping!! LOLYea I run a Tunze fan for cooling and it keeps the tank at 78 when the room gets to 81 due to its location near a slider even with ac set at 74.
Its surprising how such a small fan can keep the system cooled.
This is one on my new ext 112. It is lit by a 400 watt halide and my 150 runs the same fan on an led system.
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In my big tank heyday, I ran the tank at 70° for some of the cooler water fish I had, and everything grew and thrived gangbusters.
That being said, hyperfixating on this minutia detail isnt the way. Be consistant. That will be way healthier than chasing a specific point.
