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I want to put a solid lid over my AIO tank, both to reduce evaporation and so I don't have to worry about tiny fish (pico blennies, Endler's livebearers) jumping through mesh. I'll leave the filter compartments open for oxygen exchange.
Is glass the only suitable material that won't warp over time? I'm looking for something I can buy a custom-sized rectangle of to put on top, and acrylic warps. I know I can just flip the lid over every couple of days to keep it fairly even, but that leaves small gaps that teeny fish can get through, particularly if I forget to flip it for a bit too long.
Alternately, how much weight would it take to keep roughly a 2'x3' rectangle of acrylic from warping upward at the corners? I'm assuming a stack of textbooks on each corner would keep it un-warped, but obviously that's impractical, so is there a practical amount of weight that would also work?
Is glass the only suitable material that won't warp over time? I'm looking for something I can buy a custom-sized rectangle of to put on top, and acrylic warps. I know I can just flip the lid over every couple of days to keep it fairly even, but that leaves small gaps that teeny fish can get through, particularly if I forget to flip it for a bit too long.
Alternately, how much weight would it take to keep roughly a 2'x3' rectangle of acrylic from warping upward at the corners? I'm assuming a stack of textbooks on each corner would keep it un-warped, but obviously that's impractical, so is there a practical amount of weight that would also work?