Hello, this is my first post.
I let my pool get very green and got tired of dealing with DE all the time so I installed a Sand Filter. It's a Hayward 30" top mount 500lb capacity filter with a 1hp motor. Our pool is plaster resurfaced with fiber glass and holds 25000 gallons. Last night my FC level was about 8 and this morning it is at 0. My current test numbers are as follows:
Calcium hardness 350
Thanks for any advice on shocking and getting clear water again.