Quote:
Originally Posted by reefwithareefer
Blue or pink rigid may be too rigid. That type is quite dense and not reallyeant to compress. Home Depot sells a 1/2" foil backed, white, popcorn styrofoam that is less rigid. I used it under my 180 and 300 gal tanks. Comes in a 2ft x 8ft sheet
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Thats correct. I remember reading a tank builders thread on it, that suggested using only the white for the reasons mentioned here. That being said, I once used pink and it seemed fine but mostly the white and use some type of black edging material.