Finally got the 55 G set up like I want it. Right now there's 23 black kuhli loaches(pangio javancus) in it. soon will have a couple of Dojo loaches and some other kind of loach. Haven't decided what to put in for top water yet. I put filter media from another filter, rocks and plants from another tank to cycle it. It has a penguin 350 for a filter which I don't really like but it kept me from having to buy a new one :-\ There are bubble wands running from one end to the other down the back behind the rocks, I really like the movement of the water.The top third has a lot of current so whatever goes in for top water will have to like water movement. The loaches like to go behind the rocks and play in the bubbles. ok so heres some pictures.