Dont worry about a bit of grey.. thats just the good bacteria living in the media. Just rinse the actual gunge out.
Eventually the media will get too clogged up or start to break up and you need to replace it. But that takes ages. A partially dirty filter actually does a better job of filtering than a 100% clean one. Just rinse you most of the gunge in old tank water
Cheers
Ian
Eventually the media will get too clogged up or start to break up and you need to replace it. But that takes ages. A partially dirty filter actually does a better job of filtering than a 100% clean one. Just rinse you most of the gunge in old tank water
Cheers
Ian

