Ive done the same with acrylic but they are too flimsy and cost way too much for a piece of plastic imo. I also dont want my expensive fish to hurt themselfs or each other lol. But I went to home depot today and was sad to find out they dont cut glass anymore. I picked up a sheet of glass 16 x 20" to see if it would fit, even tho I need 17 x20. I could see it working if I get two pieces of plastic wherr I would attach suction cups that I can attach to the edges of the glass
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