Can I keep a group of 5-6 small (2") clowns in a 30 gallon tank? This would be a long-term temporary thing. When I say "long term", I mean considering how slow they grow, can they stay comfortably in a tank this size for a year or two? I am fully aware of the potential size this fish can reach, as well as their activity levels and need for clean water, and so will either accomidate them with a 100G+ eventually or sell them off when they get too big