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[attachment=0:3ppjix2a]0519121457.jpg[/attachment:3ppjix2a]can you tell me were to go with this pretty blue ph test

I have a 15 inch hayward sand filter but when my pool was delivered it came with a cart setup so I added it in series, with the cart in my gpm drop significantly so much that I have to remove the cart to vacume the pool, I have a cloudy pool but it is clearing with the help of the pool school...