Thanks all, there are 17 in there at the moment but I will be rehoming the 5 small ones leaving just 12. These 12 are all over 8" though, with the biggest well over 12" now. It is a big tank but if you take into account the 5 fully grown Yasuhikotakia modesta, 6 large angels & the nearly 2' giant gourami it takes it's toll on the filters, otherwise I would have so many more clowns in there as they are by far my favourites.