Review on Replacement Sponge For Hydro I by Robin Joseph

Love this filter, it's quiet, looks good, fits well in the tank, is very durable and really does its job. I wanted to test it so I took it out and let my tank get pretty dirty, I put on a new sponge and stuck it in without trying to clean it first and after a few hours you could see the difference. Just bought the 3rd and 4th sponges which last a long time and the filter may need cleaning once a month if that. I have a turtle in an aquarium with a minimum of fish.