# Thread: green machine

1. ## green machine

Breaker popped while on vacation, assume cause of storm. Swg and pump shutoff for 3 days. Thought my levels should have sustained that long but oh well green algae now.
Calc says fc should be 5 target 7 and shock 24. My cya is 60 ph 7.9. In order to shock to 24 I'm supposed to add 379 Oz of bleach. Once I add I come back in hour and test for fc? Using Taylor k2006 test I registered fc 40ppm does that make sense?

2. ## Re: green machine

I was not able to confirm your pool gallon size to validate against the Poolmath calculator. But a SLAM FC of 24 for yoru CYA (60) is correct. So I would think either something happened with your FC test or your pool volume may have been incorrect on the calculator? Of course I don't know if your FC was actually zero upon returning from vacation. Probably was, but ....

3. ## Re: green machine

Calc says 7600 gallons

4. ## Re: green machine

If 40ppm is true do I just wait longer for the chlorine to attack the algae?

5. ## Re: green machine

Originally Posted by Dtmos01
Calc says 7600 gallons

Sent from my SCH-I545 using Tapatalk
An 18' X 48" Intex filled to 42" is 6700 gallons. I find that for my 18' X 48" ultra frame 6600 gallons in pool math works out perfect for me.

Using 6700 gallons in pool math, 379oz of 8.25% will raise FC by 38ppm.

Dom

6. ## Re: green machine

With 7,600 gal pool, the calculator gave me 2 gallons & 2 cups (270 oz) to get from a SLAM FC of zero to 24. That's based on the CYA of 60. So I would keep the FC at 24 or slightly higher from this point forward. If it's too high right now, you can let it sink lower. It won't take long.

If your volume is actually lower as suggested above (i.e. 6,700), then you would need 1 Gal & 3 qrts (238 oz) to go from zero to an FC of 24.

7. ## Re: green machine

Even with 6600 shock of 24 is 329oz. I'm at 40ppm according to test. I'll wait 1 hour and retest

8. ## Re: green machine

Just a thought next time you're in the calculator ... make sure you are selecting the correct bleach percentage. I've been using the standard 8.25% from the grocery store. If you were using 6%, it would say to add more.

9. ## Re: green machine

I got it at 8.25

10. ## Re: green machine

Don't forget to lower your pH

Got it

12. ## Re: green machine

2-3 hours went from 40ppm to 22ppm!

13. ## Re: green machine

Still holding at 24 and pool is clearer. Slight milky white but the end is near! Just when it is starting to get warm!

14. ## Re: green machine

Don't forget to brush your pool. It'll also help your filter catch the dead algae floating in the pool.

15. ## Re: green machine

Thx been brushing twice a day it looks clear this morning!

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