New-ish pool turning green. HELP Please!

[Adiharce]

The water is clear. I actually tested this morning, but had not tested after dark last night.
This morning FC was 6.5, CC .5 TC 7
So do I test tonight after dark and before sunrise in the morning?
Also, do I add more bleach today or wait until after tomorrow morning's reading?

Off to read the SLAM link and brush!
Thanks a bunch!

 

[Butterfly]

Take the FC to SLAM level tonight for the OCLT. Let it circulate at least a half hour, then test FC & CC. Test again in the morn before the sun hits the pool.

In the morning, see red lines in my sig to see if you are done

 

[Adiharce]

Water crystal clear. Checking after dark tonight and before sunrise tomorrow.
If I am done SLAMing will I then just do the daily check?
How often do you do the "big" chemical check?

 

[Abigail K]

Please see basic pool care schedule.

 

[Adiharce]

Thanks!
Night reading is FCL 2.5, CC .5, TC 3.0
Will check again in the morning.

 

[Abigail K]

You indicated CYA 35-40 on 13th July, minimum FC is 3. Add bleach.

 

[Adiharce]

Do I add to shock level again or just to get to 4? I am thinking shock and start the checking again....

 

[Kiss4aFrog]

If you are still in SLAM you should have your FC up at 16ppm. That would include during your OCLT as until you pass it you are not done.

At CYA 40 you should never be below 3 and you want to target around 5 daily AFTER you have completed your SLAM.

You are done when:

CC is 0.5 or lower;
You pass an OCLT (ie overnight FC loss test shows a loss of 1.0 ppm or less);
And the water is clear.

When all three are true, you are done SLAMing and can allow the FC to drift down to normal levels.

Until you pass all three you should be maintaining an FC of 16 at all times.

 

[Adiharce]

Wow. Ok. Should I check hourly?

 

[Adiharce]

FC 17
CC 1
TC 18
The people at the grocery store must think I'm dissolving dead bodies with all this bleach.

 

[Butterfly]

Wow. Ok. Should I check hourly?

The SLAM directions suggest not more than once hourly but at least twice daily.

When you do the OCLT tonight, raise FC to SLAM level, circulate at least 30 minutes, and test FC & CC. Test again in the morn before the sun hits the pool

Links:
http://www.troublefreepool.com/content/125-slam-shock-level-and-maintain-shockingl

http://www.troublefreepool.com/content/136-perform-the-overnight-fc-chlorine-loss-test-oclt

 

[Adiharce]

Just for clarification: every time I check my FC it should be at shock level or I add according to the TFP calculator, correct?

 

[ship of fools]

Just for clarification: every time I check my FC it should be at shock level or I add according to the TFP calculator, correct?

You want to maintain shock level so you need to be above it when you add and then add more as it drops to shock level. Anytime you fall below shock level you are losing ground. Once you get squared away you want to keep your FC level above the minimum for your CYA level at ALL times. I run 30 - 40 CYA and keep my chlorine between 5 and 8 so i have a little buffer if i can't add it right on schedule.

 

[Adiharce]

9 am FC 17 CC .5
11 am FC 16.5 CC .5

 

[Adiharce]

Ok...I feel sure I would have passed my OCLT last night, but it rained 4 inches! Not sure what to do now. I will go look somewhere on here, but do I backwash/drain to a good level and start over?

 

[Abigail K]

Rain doesn't affect OCLT much. Recommended water level is half the skimmer, you can pump directly to waste rather than backwash.

 

[Adiharce]

I think I get a bunch of organic matter off the trees which lowers my chlorine readings. First time my pool has not turned green after a rain.

It may be a stupid ? , but what does it mean to pump to waste? Is that just that it bypasses the filter?

 

[Abigail K]

Yes, pump to waste bypasses the filter, it is good for vacuuming debris off directly. Do you have a push/pull valve, or a multi-position valve? With a multi-position you can pump directly to waste, but with a push/pull valve you have to backwash.