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.
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.