I had some Killis in my 33 planted tank but something crashed last week and I ened up taking the 4 or 5 I had plus all ( 5-6) of my Neon Dwarf rainbows and donated them to my LFS until I get the tank back on track. no clue what happend. the furcatus seemed ok but had 1 dead neon, 2 more dying (which didn't make it) and lost a killi. I actually have 12-15 cardinals in a 20 gallon at home that I considered bringing some in for this tank. I've have them a while and they are actually about 3 times the size of what you usually see in pet shops and fish stores. I should really get around to taking updated pics of my tanks and posting them, not to mention udating my signature list which is sooo outdated lol.