Hello! A few weeks ago I bought a 16 gallon tank and just recently stocked it with 6 rummy nose tetra and some ghost shrimp. In a week or so I'm gonna be adding my Betta in with them (from his 5.5 gal tank). But I was wondering if there was anything else I could put in with them? I dont want to overstock but just curious as to what else I could add? Mainly because my spider wood is growing a fungus and the shrimp arent really going at it and thought maybe a few oto catfish could help with it? Just wondering and wont really pursue any more fish unless it's possible really.