Aaron, I think I remember that you have an Eheim Canister Filter. Well...here is what I've done.
I somehow managed to get the pump head off the filter while one of the safety clutches on the multi-function handle was not in open position. Now I don't know how to get it to lock into place and thereby release the insertion opening. In other words, I can't get the darn pump head back into positiion. Am I making any sense?
I absolutely hate telling my husband what I have done. He can't understand why I have no sense in this area. He's out playing golf and I would love to have fixed before he returns.