recommend me an aditional filter for a 125? plz

[altumz]

i personally have 2 eheim 2217's and never had a problem. and they are really quiet. if you search eheim filters. you will hear lots of good things about them. i never own an fx5 but lots of member on here use them and lots of good reviews and they're best bang for your buck.

 

[cyberhog05]

aqua tops are excellent for the price! Ive been running a SunSun/aquatops for over 2.5yrs with 0 issues. I highly recommend them

 

[bassfisher91]

Another vote for a sponge filter. If you go the canister route I would avoid anything rena. They can be a pain to prime sometimes. I would just get an fx5 and just run that and the aquaclear. It seems to be the perfect size for a heavily stocked 125. If that isn't an option, go with the aquatops...cheap but they get the job done.

 

[jschall]

I agree with OP about canister filters - they're inherently "dangerous" things (from a leakage point of view). A well-done overflow is much safer. A hang-on-back is almost infallibly safe.

Sumps are best - you can add huge amounts of volume (I have 40 gallons on a 150 gallon tank) and have absolutely massive amounts of hidden space for equipment, grow-out refugium areas, etc.

OP: if you can't do an overflow and sump I would probably hang 2 AC110s and use koralia-style powerheads for any additional flow you want. The emperor 400 is a really annoying filter, although mine has lasted me quite a long time. The vertical filter media sucks, the default filter cartridges suck and it's hard to add loose media. The 2-piece impeller on mine gets into a weird state and makes a bunch of noise until the filter is unplugged a few times to torque it back into position.