Ive only heard bad things of UGF, id seriously invest in a good canister, i know their expensive but sometimes you can find em on CL or ebay and even on this site.
I run 1200gph on a 90gal, so roughly 14x turnover rate. 1 ac110 1 rena xp4 1 9wattuvc sterilyzer and i still have to clean alot!!
You could keep one 400 on ur 125 but decent filtration is a MUST! H.O.B filters arent the most effiecent method, canisters provide excellent mechanical filtration!!
Goodluck and take ur time, dont just go out and buy the first thing u see, save 20$/week and it 8-10 weeks order that sweet rena xp4 and youll absolutly love it!