for sure, don't just use a UGF. i had a spike (dont remember what) that killed my previous silver cuz the LFS kept pushing how great UGF's were and how it would be the only thing i would need. i added an emporer 400, but got rid of the UGF since theyre so ugly, esp when the tubes turn yellow. I would get maybe an AC110, Penguin 350 or Emporer 400 along w/ an XP3. you can get an xp3 for 110 from petsmart if you print off their online price printout and bring it into the store. if you can, i would get rid of the 125 and get at least a 180 so itll have a lot longer in that tank. if i didnt have the BGK i had for so long when i decided to redo my tanks, i wouldve gotten rid of the 125 and got something else.