ply tank leaking

hi,
i reacently built a 8x2x2 i built the tank on a very tight budget. That was my biggest mistake the ply i use i dont think is quite strong enough. I also used a paint for sealing ponds. The problem with this is that i think it is a concrete base paint and silicone wont stick to it very well. Iam now thinking of taking out the two section front and putting in one piece of glass. Also taking out the suport in the mid and leaving the overhang of about 2", So the glass has a nice soild 2" wide seal all round the front.





me in my tank well box







all sealed up







seams are reasonably neat









glass going in






just need to support the frame more





water going in




i fill on unlevel ground this was to see if i could bust the end out. i was alittle worried about the thickness of the timber. So far so good.





first time full of water





everything going in for a week long test






3 of our oscars and the real horses head





I have since added more suprots to the tank i had problems with the front bottom lip (timber) bowing out and it seperated the glass from the timber.

The leak was right along the bottom edge of the left sheat of glass the silicone and paint did not stick well in most parts but did in some. The paint stuck good to the wood but in some spots it lifted abit due to me leaving it where the sun got to it, empty and not dry fully. So i ran a knife through the bubbles that had formed and the wood was dry. The paint was put on thick so it had formed like a rubber coat with a stone texture. So i laid fresh paint in, left to set and that seemed to fix them. I am still left with the problem of the glass, but as i said i think i will put in a one piece front. Also i did ring the company the makes the paint and spoke to the tec who was quite helpfull. He did say to me that it was not tested for wood but should be ok, of course no guarantee!.

The product i used is Crommelin pond sealer blue.

So you are saying that the ply will effect the paint?