Tank Cover eh!.. hmmm...... Ideas ideas ideas... I might look into that. Thx. As I said before, I tried all that just because I was told it was not possible but no one said that out of first hand experience or at least failed to show me enough evidence otherwise. But I am very happy with my plastics except for the tank. Which is still fine, because I waste about 2 minutes or so every month pinching the couple of bubbles that form and letting the air out.