Is that the 8' x 3' x 3'I own an acrylic tank for about a year and half now. I noticed that the lid warped really bad that it no longer covering the tank which results in temperature lost. I emailed my manufacturer and he said polycarbonate lid will last longer than acrylic. Have anyone use this for their lids? Attach are pics of my lid which are 5/8" thick acrylic. I know glass would solve this problem but last resort.
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