If I was ever in a situation where the chems are as messed up as they seem I think I'd try rweaking things on a small scale first, just to see if whatever you do yields the expected results. a.k.a the biggest plastic trash can you can find and scale the chemical additions accordingly. Any damage that can be done is probably already done so the additional time it takes messing with a trashcan full of pool water won't matter. Can also save a bunch of $$$.
Al