Gryph
Aquarium Advice Regular
That's what I use them for. Note, some people adore their Whisper filters. My own personal experience hasn't been that great. Mileage varies. But honestly, Aquaclears or Penguin/Emperors are about the best you can get.
I wouldn't go out and purposely buy a Whisper. Since you've got one already, though, you might give those spongey filter bags a try and see if they work well. If they do, nifty. If not, just nab yourself a new filter.
I wouldn't go out and purposely buy a Whisper. Since you've got one already, though, you might give those spongey filter bags a try and see if they work well. If they do, nifty. If not, just nab yourself a new filter.