OMG there is a lot of action going on in that tank, looks crowded but the rays don't seem to mind. I think i counted 5 rays there, what size tank? I have 5 in a 9x4 foot print. Just had to remove my last piece of bog wood this week end as the male is desperately trying to get his way with one of the females and the wood seems to get in the way. So far he has been stung in the top of the disk and somehow cut his belly open. So nothing to stop him now (hopefully). Good luck with yours mate.