I got an EHEIM 2217 for my 90 Gal, which media?

They come with media... but you can use anything you want.

Yea I would just use what u want.I use seachem matrix or de-nitrate.i have used other cheaper ceramic, old media from busted canisters or sale item. All does the same, place for bacteria to colonize

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Matrix works great in those.. www.petmountain.com has a great price on the stuff right now too.


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I use it in my 150gal sump. to unlock it's full potential you need to use it in a hyper-aerated fluidized bed. So I have a pondmaster 100 pond pump with 10 stones that violently aerate and circulate it in the sump after the water passes through filter socks. The tank has a massive bioload and ammonia is always zero. The idea with it banging and circulating constantly is only the strongest ammonia eating bacterial colonies will propagate. You also don't have to clean it. At least I don't, as it cycles it will turn off-white to yellow as the biofilm develops. Take a while to cycle but ultimate biofiltration. Not ideal for a canister because of design. You can use soda bottles with an airstone DIY. YouTube soda bottle K1 for ideas

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I think King of DIY aquariums did one of those soda bottle jobs.