Only limitation now is space - our house doesn't really have many more surfaces we can put tanks in, unless we start taking over the bedroom - the only real non-tank sanctum!
Plus I would never be able to park one on the drive........oh, not that kind of tank?
9 as of yesterday so only 8 in use (only?). The 9th was good value. A fluval 800 deep (approx 125 litres) all in with stand, plastic plants, fish food, 3 bottles of 'cycle' 'plant food' and 'water conditioner' 1 algae/phosphate remover pad for £169