portabuddy;786717; said:there is no "wood" that show in a plywood tank, its alwys water proffed, my 'glass&resin, alrylic, a protective paint or a ruberized coating... it the wall was covered by algea they would just eat the algae and leave the waterproofing stuff alone. this would be the absolute last thing i would be worried about with a plywood tank...
not that im saying that they are bad or anything, i going to be making one myself...