Wat ru running on filtration? U shouldnt have a volitan in there anyway. Im upgrading to a 120 to house my volitan. He barely fits in my 55, he aint too happy. U cant house a volitan for life with as many tank mates as u have. Depending on his size, u shouldnt even GET a fuzzy dwarf, and also get rid of the eel and the puffer. U should have some SERIOUS skimmer on there, plus like a uv sterilizer and carbon even. U got some serious pooping machines. And, the dwarf wont survive, cuz while yer trying to feed it, or teaching it how to feed, other faster fish will get there first. I wouldnt do it. Wait until u get that big tank that yer thinking of. If u need to, then get rid of yer fish, or jack up yer filtration to the extreme.