Last night one of my filters died on my 55 gallon. Luckily I still have one on there that should get me by until Christmas (Finally getting a canister filter!) But I'm worried about my filter media. I was able to stuff the remaining filter with two sponges from the dead filter, then I have two others floating in another tank. I'm not worried about the 55 gallon because it's very lightly stocked, but I'm not sure about the media floating in the other tank. Does the media need water running through it to survive? Or will it be fine for awhile?