So here it is: emperor 400 on my 120g cichlid tank is crapping out and I am looking at either replacing or trying something new. I ran across a few HOB sumps, but they seem to have mixed reviews. Anyone have one and have input? this emperor 400 is used mostly as a home for pothos, so all I really need is something that can cycle water past the roots and keep the water flowing. Any and all Input would be appreciated. Thanks in advance.