Lost a few fish in my 30 tall in the past month due to disease or stress and finally have the tank back under control. Stock is down to: 1 Koi Angelfish (quarter size), 1 Blue Gourami (3"), 1 Silver Sailfin Molly (2.5"), 2 Bronze Corys (1.5"), and 1 asian bumblebee catfish (3.75-4"). The tank dimensions are 24" long by 12" wide by 24" high. Filtration is a penguin 200 hob and water changes are 50-60% weekly. It looks really bland and boring with only a few fish that are constantly swimming and I need so action and color for the tank. Only catch is for those of you who have kept asian bb cats you'd know that they like to eat a lot like all cats. Well somehow mine at only 3.75" managed to down a 1.25" longfin bristlenose pleco the other night in seconds. Meaning the new fish can't be to small so nothing under 1.5" at purchase size unless it's tall bodied. I was thinking of a few different choices and have been browsing my LFSs for what's available that catches my eye. Some fish I was considering (not all obviously) were: lemon tetras, emperor tetras, serpae tetras, a few more mollies, debauwi catfish (probably my favorite option), Synodontis nigriventris, or some type of smaller pleco. What are your thoughts?