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Should I lower the CYA then? I already have the test kit as recommended from this forum.

I’m already doing that for the pass week with no real results, still green.

FC - 13.5 CC - 0.5 CYA - 70 PH - 7.4

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FC 13 CC under 0.5 PH 7.4 TA 80 CYA 30 Still green, what do I do now? Add more liquid shock?

No well. Nothing unusual, just lazy and neglected before I left for vacation. It was a little green before I left, didn’t expect it to go this green after a week, lesson learned to dump shock in it before I leave next time. CYA unknown because I’m out of the test kits for CYA testing, but I’m...

K-2006 I’m out of the CYA liquids so I can’t test it

FC 16 TC .5 PH - 8.0 AKALINITY - 50 CYA - unknown, probably low or none, out of test samples liquid Filter on for 3 days in a row now, pool is still green after I came back from a week’s vacation trip.

How many bottles of this should I add?

FC (free chlorine) - 2 CC (combined chlorine) - I’m confused with testing so I don’t know I assume it’s also nothing, opened the pool Saturday, filter running non-stop, added 3 packs of shock on Tuesday night. pH - under 7.0 TA (total alkalnity) - 40 CH (calcium hardness) - 100 CYA (cyanuric...

Is this black algae? But it looks more like muddy brown though. It dissolves once i brush it.

That makes sense now thanks!

Got it thanks! Will throw in two gallons now and run the test.

How come every time I click on the SLAM process link it brings me to this page? Doesn’t really show the instructions or how to test the overnight chlorine lost test.

Alright, will do that. How much chlorine is 10ppm? I’m gonna dive in and manually vacuum the remaining algae in there. It’s okay if it goes insider the filter and then backwash later? I’m also suspecting aomething is broken inside the filter. I see a lot of sand in my pool, could be sand from...

Not sure how to read it.