Originally Posted by Billyboy
I was just cleaning by eheim 2217 canister filter and there is a bag full of what appear to be rocks. The rocks in the bag make no sense to me. Am I supposed to open the bag and pour the rocks in? Let me know. Thanks in advance to all who reply.
The Eheim Classics all come with the media inside the canister, all contained in seperate plastic bags.
Open the bags, rinse the media then put it back in the filter in the order shown on the box/manual.
You said there might be holes in the bag? If the media is wet, i.e. it's come in contact with tank water, rinse the media in tank water not tap water. If it's dry tap water will be ok.
There should be no media inside plastic bags while running the filter. If the media is inside a plastic bag the water won't come in contact with it and therefore bacteria won't grow on it.