I would just hold off on draining any water myself. Again, I'm sure your numbers are high....but let's just see how much you'd need to drain. It would be a waste to drain 70% of your pool, only to find out that the tests were so far out of whack that you only needed to drain 25%. To me, if the test results were off at all I'd ignore the results all together and get it tested again. Here is a great case where spending the cash for a good test kit (TF-100) can save you a TON of money in water bills. Do only what you NEED to do to the pool...and don't make extra work and expenses for yourself in the long run.