When I set up the hospital tank to move my clownfish with an eye injury to, I took the sponge out of my Aqua Clear filter running on another small tank that has been set up for awhile and I put that sponge into the new Aqua Clear filter for the hospital tank. My question is: Is the sponge going to absorb the medicine and lessen the effectiveness of the treatment? Or is it alright to leave the sponge in the Aqua Clear. I am not using the carbon.