How to remove glued pvc bulkheads ???

Got a pic? Hard to tell what you mean. Are they on edge, vertical, horizontal? Are these 4 on the perimeter at the top? Etc.....
Without a pic it's a guessing game.

 

They are on edge, vertical

 

Got a pic? Or a diagram?

 

Great suggestions so far. Like missionsix said, if you can fit some mason's twine (braided, usually pink, very strong) in there, just work it back and forth, take your time. The hacksaw idea would have been my first suggestion until I read mission's! If you remove the blade from the saw, and wrap one end in electrical tape for a grip, a hacksaw blade makes a fantastic flush-cutting tool.

No problem--you'll get it. Take your time and you won't break anything.

 

Thanks guys. Ill try to get pictures tomorow. I am not staying at the new house yet, trying to finish floors and walls before I move next Sunday.

As far as stand, imagine a table and the legs of the table are 2x4's that come up flush to the tables top and the table is all wraped around with wood. But the aquarium would be resting on the "tables" legs.

 

Consider putting a 2x4 perimeter above the 4 upright legs. This way, the load of the tank will be distributed around the frame, rather than soley on 4 corners.

Here's my stand:

 

Ok so after an hour of frustration with a little hacksaw blade I took a good old oil lamp (kirosene lamp) and started to melp the plastic and use pliers to take it piece by piece off hehe.

Thanks every one. Here are the pics of plastic and tank half way filed. Stand is holding up and tank appears to have no leaks. I placed one power head in there while the salt mixes.





Now I will wait a day or two and move my live rock at first and add rest of the water from my tank. Then Ill move the fish and corals a week later. Also will set up the sump when I fill the water all the way.

 

Glad you got them out of there. Glad you were able to use the sledgehammer with any trouble.;D

Looking good.