I lift the plastic cannister about a foot or so to let the remaining water drain out of the lower spout through the intake tube into the bucket. I leave the output hose connected to the top. It is now safe to pop the cannister top off. While waiting, the water in output hose will also have drained by now back into the cannister. After a brief while, it will have siphoned a lot of water out of the cannister. Perhaps you might try this to save your relationship with this lovely filter :-)ДЇirstly, I disconnect the hose at the intake tube (inverted J tube) way up near the aquarium top. When I disconnect hoses, I use the following procedure to not have water everywhere. It's at least 20 years old and still going strong. bought before it was relabeled a classic. It annoys the ****out of me, or rather the double tap connectors annoy me, water going everywhere each time I disconnected the filter, so it sits unused. Together these 2 canisters should do an excellent job. Now my XP3 - running for 2-1/2 years so far with no problems. She complained and they finally sent her another pump head, a new 2028. They sent her a new pump head, a 2028, but it was a beaten up non-working one. She actually had to send the pump head back to Eheim in Germany at their request. My friend also bought a used Eheim 2026 and that thing leaked all over the place. With what I've spent so far on new gaskets, on top of what I paid for the filter, I could've added a bit more and bought it new. I don't think I'll ever buy used filters on Ebay again. Now I just have to figure out which gasket is leaking a bit, even though when I ran the filter for a 24 hour test, there wasn't a single leak. the Discus seem to have adapted to the greater tank flow now anyway. I was able to disconnect the hoses from the canister by pulling the lever, but I don't want to try adjusting the flow with that safety lock stuck in.

Eheim professional ii manual