Just a side note on sewellia lineolata. Yes, according to most sources, they do enjoy a high flow rate. Is this the only way you can keep them ? I would say, no. I keep them in my 46BF and the only flow they get is from my 2 filters, the AC 70, and the Emperor 400. Neither one of these provides a great "flow rate". Sources also say they like cooler temps. While this may also be true, I keep mine at 80° and they are happy. How do I know they are happy,you ask? Well, they have spawned for me under these less than ideal conditions, at least once, and I suspect, twice. I say give it a shot, if that's what you want. Good luck.