I have the same Whisper filter. I took a pair of knee high stockings you get at the department store for .33 cents and pulled it over the bottom of the filter. It traps some of the bigger stuff before it can clog the inside filter. Helps a lot and cheap. You can get a small HOB
power filter online for $11-$15. I order from this place Aquarium Filtration and Water Quality: Aqueon QuietFlow Power Filters
. A link to a cheap HOB
is in the link. I like how quiet my Whisper Internal filter was but it really didn't filter much. I did buy a Whisper HOB
but it was really noisy and I replaced it with an Aquaclear50. The Whisper40 HOB
filtered great and was cheap, $16 but I could never get it to quieten down. The only way I could limit the noise was to feed my CO2
into the intake pipe. No idea why this quietened it some but it worked.