It was recommended that I test CH, PH, and TA for the fill water that I will be putting in tonight for my pool and post the results for any feedback on chemicals needed for startup. They are shooting the quartz aggregate plaster today. I used my TF-100 and it seemed to go well with very clear instructions. My only question regarding the test was with the CH, it went from red to a slight blue tinge at 240, is that what I was looking for or is it a dark blue? I read it pool school to add sequestrant at startup, what exactly is this and do I just ask for that or a specific name. Thanks alot for any feedback, to see I have learned so much from pool school and everyones posts is a huge understatement, it is funny how empowered you feel when testing your own water...lol....thanks again all !! Oh and the pool is 15x30, with an average depth of 4.2, however I have a sunshelf with 8 inches of water , so I am using a pool size of 14x29 to deduct the reduction in total volume due to the sunshelf, does that probably make sense? With that I get 11400 gallons.