I have a 180 with some Vieja, a GT, and some clown loaches. I recently switched to pool filter sand, and now I'm getting poop all collecting in a couple locations on the sand no matter how I align my powerhead. For water movement I have an old-style Maxijet1200(before they got the circulation piece), an XP3, 2 AC110s and a couple sponge filters. Given the fish I have, I'm considering ordering 2 new model Maxijet 1200s and taking my old one out. This would give me about 2300GPH more flow in the tank. What do some of you guys think? Too much flow for the Vieja and GT? I've heard that increasing the flow would also help keep the aggression of some CA down since they're too busy in the current. I'd be interested to hear your thoughts. 