I never said anything about a pump. Siphon the water - you will be amazed at the suction power this can create.
A pool vac hose - begged, borrowed or bought - will be far less than a service call, and you can use it later for water changes.
Win win.
I have one of those
But heres the um other issue,
I hard plumbed my pool last year because the hose that came with it kept bubbling. it was clear with a wire running around it.
Well my son ran into it and broke the threaded end of the male adapter in the diaphragm. now i have no idea how to get that out