"When I went out to check on my batteries today I have all sorts of corrosion and it took 5 bottles (17oz) to fill them up!!!"
5 17oz bottles of water is a lot. If you let the tops of the plates go dry, you're probably in bad shape.
If the tops did not go dry, then you're probably OK. GC batteries can take a lot of abuse (that doesn't mean you need to abuse them though). Clean the corrosion up, and do a load test; see how they work.
You probably ought to get a battery disconnect and a battery tender. A good three stage converter would be nice, but a disconnect and tender will do fine if used regularly.
Doug