Algae and other help....

[2 days the day]

We have some unusual brown spots on our pool. I would think it was algae it isn't slimey and it doesn't brush off. Here are my numbers - the FCC is low because we didn't put any chlorine in it last night because it was storming.

Ph 8.0
FCC 1.5
TA 150
CH 175
CYA less than 30

I don't know what to attach first!

thank you for any help!

 

[Richard320]

pH first. It should only take an hour or less to mix well and then you can raise FC.

CYA can be adjusted all the while, as it takes a few days to dissolve. It gets tied up in a sock or nylon stocking and suspended in front of a return or dangled off some kind of float like an empty bleach bottle or a pool noodle. Don't just pour it in the skimmer. If you need to backwash, you'll lose it.

As for the stain, post a picture.

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[2 days the day]

Green pool turned blue but now in trouble

Mod alert: Please keep your posts about same subject in one thread...thanks

We have a mesh cover that we use to protect our pool from the spring live oak 'droppings.' It was a swamp when we pulled it off last month. After weeks of pool school help and a lot of cleaning of the filter, the pool is clear. BUT now we have some brown patches. I would think it was algae but it isn't slimey and it doesn't rub off. I add 128 oz of 8% bleach each night and and about of quart of muratic acid every two days to low the PH. I know we aren't doing it 'right' yet. Here are my numbers. My FCC is low because we had a storm last night and I didn't add chlorine.

What should we focus on???

Ph 8.0
FCC 1.5
TA 150
CH 175
CYA less than 30

 

[2 days the day]

I add 128 oz of 8% bleach each night and and about of quart of muratic acid every two days to low the PH. I know we aren't doing it 'right' yet. Should I be worried about the TA or the CH?

Ph 8.0
FCC 1.5
TA 150
CH 175
CYA less than 30

 

[linen]

Re: Green pool turned blue but now in trouble

What is your CC?

I would bring the ph down to 7.2 then start the shocking process, and do the Overnight chlorine loss test (OCLT) to see where you are.

 

[2 days the day]

what's cc?

 

[Richard320]

what's cc?

Combined Chloramines. That's like halfway used up chlorine. pool-school/swimming_pool_definitions_abbreviations

The blue-grey tint and the olive green patch all point to algae. The CC test will help confirm it.