Thanks for the help everyone. CYA is about 160. I guess draining the pool all the way and scrubbing the sides might be the ticket. I haven't had a chance to research acid washing the sides. What chemicals should be used and what is the best plan of action? Should I consider refinishing the sides?

One last question. I have some leftover sodium dichloro-****. Does this have any stabilizer in it? I know the trichloro does but not aware of the dichloro. I definitely don't want to put any more CYA in the pool unless I have to.

Thanks,

Greg