When do I change the filter inserts ?

Question

I got a 5 gallon tank that comes with a Whisper filter .

When do I have to change the disposable cartridges ?

http://www.petco.com/Shop/Product.aspx?FamilyID=13867&cm_sp=certona-_-4-_-13867

Answer 1

When the water flow slows down you can rinse out the cartridge in old tank water (when you do a partial water change) and re-use it. Eventually it will fall apart or get too clogged to rinse out, then you have to change it.

That will save you money, and avoid cycle problems in your tank. When you change the filter element you throw out a lot of your filter bacteria, and you are likely to upset the cycle in your tank. Dont worry about the gunge that you cant get out of the filter, a lot of that is actually the cycle bacteria.

The manufacturer will tell you to change the cartridge each week, but they are the ones selling you the new cartridge arent they.

Ian

Answer 2

I'd recommend changing it every 3-4 weeks depending how many fish and how dirty the filter cartridge is.