It is possible in any way to remove the internal filter casing thingy thats inside the Juwel Rekord tanks? I have an unused external eheim canister filter I would like to use and think the internal filt is a wast of valuable swimming place for the Green Spotted Puffer's I want to get...I am upgrading my tank in the new year so the fish will be moved to a larger tank so no need to suggest a bigger tank, these are only going to be baby ones, not even an inch long...but yeah...any suggestions?