Hey all. Been lurking around for a month reading and gathering as much info as possible for my first pool. I purchased an Intex 18' x 48" easy set pool. Rented a sod cutter and removed all the grass, then leveled with sand, and compacted. I was only 1.25" off so it was not to bad, one weekend and a case of beer! I'm using the stock filter with a SWG. I purchased the TF 100 kit and my question is should I test the water before adding the salt and running the generator or after. Any help or suggestions would be greatly appreciated. Thanks