I have seen a tank made of acrylic that a ray chewed on and it's amazing what they can do. It was not too bad but that was on acrylic. Is this normal behavior for rays? I plan to keep some rays soon but don't like the idea of them chewing on my tank I just polished. 45 mil is thick stuff I would think it would hold up to a good beating. Anyone have ideas how to help a ray not chew on tanks and such? Maybe they just need more entertainment in life. Lol
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I kept some motoros and marble motoros, sizes ranging from 12" to 24", in a pond with an EDPM liner for about a year, was always worried I would come out to find a barb through the liner or someone chewing there way through it but I never did. I did have sand in there to help protect the bottom from chewing, but they still could have gotten at it if they wanted to.