I'm considering purchasing 6 or so of these guys for my 65 gallon tank that currently only has 5 tetras in it. (I am slowly building the population in a new tank.) These guys seem really attractive, but the bit of info on the sale page (http://www.liveaquaria.com/product/prod_Display.cfm?pCatId=846) says they need a soft-bottomed, sparsely planted aquarium with tepid clear water and some current. My tank has a smooth pebble substrate and is rather heavily planted. Will these fish like my tank or should I look elsewhere? Since these guys cost around $15 each I want to make sure they'll do well in my tank.