For past few years, every time I let my water go green over winter, all I really need to do is SLAM, and alll other numbers remain in good range. This year, I started the SLAM, and went to test my water, and found my CYA is zero. I assume it to be zero because the test is as though I am just putting water in the tube, it never gets cloudy at all, and I fill it to the top. SO my question is, do I need to get the CYA up before I start the SLAM? If you say no, and go with SLAM, then how do I calculate the target FC shock rate? DO I just go with the chart at CYA 20, or what? Here are my other numbers:
pH - 8.0 (1st time in years it has been above 7.4 - 7.6)
TA - 50
FC - 5 (was about to add more)
CYA - 0
pH - 8.0 (1st time in years it has been above 7.4 - 7.6)
TA - 50
FC - 5 (was about to add more)
CYA - 0