When the systems were running, the small unit had a 1000 liter IBR tank as a fish tank, and the big unit ran on a 2500 liter fiberglass tank that was custom made. Grow beds both sides were custom made. The units are shut down now as the family is relocating. I'm in Cape Town already, and the house is on the market. Will see about getting a new system as soon as I have a new house here in Cape Town.