I'm still trying to finalize my plans for a 125 that is going to have Firemouths, Honduran Red Points, Swordtails and Mexican Tetras. I'm going with 1 FX6 and I cannot figure out what else to go with. I'm thinking another FX6 or 407. If you were setting up a new 125 and going with all new equipment, what would you go with? I should add, a wet/dry or sump is out of the running for now.