Fluval U4 - thoughts?

[FishInMaryland]

A long story (acrylic tank not designed for HOB, and external canisters leaked - husband won't go for another external canister), but to set up my 125g tank again, I need to use an internal filter. About all I can see that may work is to use two Fluval U4s. They're described for tanks up to 65g, but I've only found 2 reviews, and neither of them mentioned what size tanks they're on. Does anybody here have any experience with them, or have any thoughts on how this arrangement may work? Due to hard water/high ph, I'd likely set up an African cichlid tank.

Thanks for your thoughts.