Grout Dark Stain
- Thread starter gonzo
- Start date
What do your water levels look like? FC, etc? How do you test and treat your pool on a daily, weekly bases?
Kim
Kim
I test chlorine and ph daily, the rest mosthly weekly
PH - 7.5
FC - 4
CC - 0
CH - 375
TA - 80
CYA - 70
PH - 7.5
FC - 4
CC - 0
CH - 375
TA - 80
CYA - 70
Are you running the Nature 2 in your signature? It could be metals splashing. It also could be mold or algae if you are not brushing regularly. Last, I would keep the FC higher with a cya of 70. I'd target 7 to 8.
If you look at this chart you are below the min. FC for your CYA.
Pool School - Chlorine / CYA Chart
Do you have an pucks? Try rubbing one on the dark spot and see what happens.
Kim
Pool School - Chlorine / CYA Chart
Do you have an pucks? Try rubbing one on the dark spot and see what happens.
Kim
I only used the Nature 2 with the initial cartridge for about 3 month. I brush once a week. I have tried spraying regular bleach and brush locally, but not change. I will increase chlorine just in case.
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