MatthewD

Thanks Nays, I have bought some Bio Sponge and Ceramic Rings.

Hello, I am putting together a tank for the first time since the 90's (I've been out of the game for a while) and I have purchased a Aqua One Clearview 300, the first thing I have noticed is that the sponge is thin, I mean it is wafer thin, here is a photo of one, you can basically see through it and see the activated charcoal behind... http://www.theanimalshack.co.nz/product/cartridge-carbon-h300-47c-47c/ I was very surprised to see such a thin sponge, its actually a bit confusing because other Aqua One filters seem to have thicker sponges... https://www.amazon.com/Aqua-Clear-A618-AquaClear-Foam/dp/B0002563W2/ref=sr_1_21?ie=UTF8&qid=1507279857&sr=8-21&keywords=aquaclear+70+filter The other half of the filter is a plastic biogrid which doesn't look that great either, I mean it has way less surface area than a piece of sponge would. I am wondering if I would be better to just get some thicker sponge and put it in the place of the cartridge, this would mean doing away with the activated charcoal which I don't think I need. Thanks, Matt.