as it is says im looking for a HOB Whisper filter that takes medium cartridges mine on my 20L is just not working properly and its annoying i need this style becaus ei have a year supply of filter cartridges for it already its ok if its missing an impellor i have one but it isnt working in this older style filter and isnt creating the waterflow i need.

thank you

I have a used  wisper 60 if you want, its yours. works good just pay it forward to some one next time. pm me your number if you want it.