180 Gallon Tank

The effect of the high wattage lights on the top of an acrylic tank would have to depend on how close the lights are to the top and what kind of lights they are. I don't see how a normal hood, holding the lights 2 inches or more from the plastic, with some air circulation thru the hood could warp the acrylic. Acrylic does warp from water absorption though. How much warpage is probably dependent on how thick the acrylic is. I know from experience that 1/8 inch thick acrylic will warp a lot.

 

my 3/8 inch acrylic tank has held up well to what has been 4 wpg on 2 inch legs.. Angelo at Saline Solutions - Wall Fountains :: Indoor Water Features :: Aquarium Equipment does a really neat tank btw for a great price. He made mine and I couldn't be happier. a 180 gallon tank would absolutely be thicker than mine too

I met him because I was on the telephone with a manager at Big Als when a different acrylic tank I had ordered from another manufacter arrived in pieces literally.. it had been so hideously packed. Dan at BigAls felt so sorry for me he called his friend Angelo .. and well, the man does incredible work!!! and he is a true mench to boot. I completely and wholeheartedly recommend him.