I have a 55 gal. tank with 4 piranhas that are between 5-9". I'm currently running 2 Whisper Power filters and thinking about updating the filtration system to Fluval 306 Series 6. Will that be good enough for my tank?
Check out BF/Cyber Monday deal week... narrow down to pet supplies and there's going to be a FX5 deal coming up at 4PM PST... maybe you can score one for cheap!! I currenlty have four P's in a 75gallon w/ FX5 and it's a great filter