Outside of the overkill and why responses, what is the disadvantage of having a layer of black pond shield covering the back, bottom, and side panels of my used 220? I have already resealed it and did a water test (3 weeks). I already plan on painting the sides and the back black. So why not coat it deep enough (1/4 or more) to cover the seals? Basically, the only seals that have any possibility of leaking will be the front glass seals facing forward along the sides.