Lately I've been kicking around the idea of making a cover for my 90 gal. tank corner overflow. Seeing It Is half round maybe I could use plastic gutter guard as a backer aka easy to form...lol. As the tank is up and running, I don't want to use anything that will send my tank chemistry into orbit. Is there an easy to use reef safe plastic or rubber product out there? Any suggestions will be helpful including the best way to make it. Thank you in advance!
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