I have a one year old Aquaripure nitrAte canister filter, medium size for sale. Paid $280, will sell for $200 firm plus $10 for shipping, I'll cover the rest. This size filter is rated for a 55-130 gallon tank. It needs a new injection port, which you can get from Aquaripure for $10, otherwise it works great. PayPal is fine too, thanks!