I have a 20 tall tank I'm going to set-up as a vert tank for golden mantells, I'm going to make a door for it that will be on the side, and put a peice of plastic aquarium tubing into a hole I'll drill into the plexiglass for overflow run off, the bottom will be gravel and I will slope a little for a water feature, the gravel will have moss growing on top of it so the frogs can't eat the gravel.
My question is should I use a pump of some sort or manually change the water or what?
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