Hey everyone. I currently have a 10 gallon and two five gallons running with bettas in them, but I just got a 37 gallon tank from my boyfriend. I had to order a stand today as well because I don't have anything in the house strong enough to hold it. Here are some things I have questions on. 1. It comes with a Topfin filter rated for the size of tank it is. Is this filter going to be good enough, or should I go ahead and buy an Aquaclear to substitute (i've always preferred aquaclears but if there is a different better or cost effective suggestion im open to it!)? 2. I want this tank to be full of live plants. What kind of substrate would you suggest? I really want black sand- but what brand? Is the Seachem Flourite sand any good? 3. do i do about fish? I plan on putting my 6 kuhli loaches in there, but besides that I haven't got a clue what to do!!