thanks, weirdest thing is i put them in my 180 with another pair perculas. and all 4 seem to be getting along fine. they flared up when i first put them in, but it's been a week and all seem to be getting along. i have a refuge just in case it doesn't work but have to keep my fingers crossed. is there anyway to tell a black saddleback from a black ocellaris (physical traits). i paid 70 bucks for the pair at my lfs so i guess it's a good deal then.