Green pool

[Dakota76]

So I slammed pool and passed over night test it was under .5 fc going down around 1 per day but still cant get water clear. I have scrubbed it daily, backwashed and vacuumed. Here are my levels:

FC-7.5
CC- under .5
CH- 180
CYA-40
TA- 100
PH-7.4

I used my Taylor tf-100 for my tests. Thanks for help!

 

[mknauss]

Stay at SLAM Process level FC until water is clear. Read the article for the three criteria of a successful SLAM. First is crystal clear water.

 

[YippeeSkippy]

You don't need to do the OCLT until the water is gin-clear. It will be the last step in a SLAM process.

You SLAM until your CC is 0.5 or less, Your water is crystal clear and then lastly you run the OCLT and lose no more than 1ppm FC.

Maddie

 

[Dakota76]

Thank you! 1 more question could it be high phos as well? How should I test that? And if it high best way to lower it?

 

[BattleOfYakima]

Good question! No, this algae is from under-chlorination for your CYA level. Or, in other words, you fell below the target range, and probably below the minimum on this chart [FC/CYA][/FC/CYA].

If you really do the SLAM Process (keep FC at your Shock/Slam level until the pool is bottled water clear - your phosphates could be 99999999 and it wouldn't matter because you would have ZERO algae.

So again, great question, but phosphates are just a profit machine for pool stores robbing their customers blind.

- - - Updated - - -

Just to make sure you understand what SLAM Process is saying: Get FC to 16, keep pump running 24/7 if possible, brush at least once a day if possible, and test FC 2-5 times a day (and bring back up to 16)

This will be a few days - or potentially longer. Does your sand filter have a PSI gauge? If so, write down what it says after your next backwash. Then don't backwash again until it is 25-30% higher than that. Backwashing too often actually slows down clearing it up.

Also, you're off to a great start with real test kit, brushing, vac, backwashing - I'm really glad you found us!!!