Hi. I have four plastic tanks that would be suitable for fish tanks. They came out of my electrophoretic coating plant that I have closed down. The tanks had rinse water in them and are OK for fish. I have a number of stainless tanks and I will be using some of them for my own system. The tanks are made out of 10mm poly ethylene welded and have a sloped bottom to an 1 inch BSP outlet socket. They are 500 wide 950 deep 1200 Long. The tanks are top quality and cost me $1000 to buy. I will sell for $400 ONO. They have a small over flow tank at one end but that can be disregarded when using at as a fish tank. If you know anyone that may be interested, I'm in Ballarat Victoria and I can be contacted on