I've been lurking about for the past week or so and thought it was time to finally chime in.
I inherited an 18,000 gallon gunite pool with a dying Nautilus NS DE Filter when we bought the house last summer. I had been relying on Leslie's Pool to test my water prior to finding this site. Luckily their numbers from the last time I took my water in for testing is very close to the numbers I just received from my brand-spanking-new TF Test Kit (thanks for the recommendation). I figured that since I'm saddled with the pool for the unforeseeable future, I might as well learn how to take care of the darned thing properly.
This is a wonderful site and I've already learned quite a bit. Thanks!