Originally Posted by OldCoot
Don't think you can pull the pipe if it is glued to the tank.
Here's a thought. Get a grinding wheel, grinding stone, etc. or something similar that goes into a drill. Get a long drill bit extender long enough to place the grinding wheel below the end of the tube. Set your drill on high speed and put the grinding wheel below the end of the tube and pull up. Little by little you should be able to grind the end of the tube upward. The grindings will be flushable in the tank. Probably need several wheels as you grind them down. It sounds a little crazy but I bet it would work.
It will take a while but it is simple work compared to the alternatives.
Something like this but bigger that you can pull up on. Hopefully you can find something a little more aggressive than that wheel in the photo to speed things up.