green water

[wolfcue]

I have been keeping the CL at 15ppm and the green is gone. For the last 2 days the water has not looked any different, it is just a little cloudy. I just have a cartridge filter, but put a clean filter in it. Should I still keep the CL at 15ppm? It is only dropping down about 2ppm from the morning check to the evening check.

Thanks
Peggy

[duraleigh]

Hi, Peggy,

Yes, I would keep it at 15+ 'til it holds overnight. I think you've cleared the algae but the high Cl hurts nothing and will only help clear your pool.

Your pump and filter capacity might be the reason it's going so slowly, but keep that pump running and a clean filter in there 'til your water is clear.

Even tho Ben's table doesn't say this, you might consider dosage to reach 18-20ppm. My pool stayed really cloudy because I was hovering around 12-14ppm for a few days so I boosted it just a little extra and it cleared in 24 hours. The main ingredient now is to STAY THE COURSE. You're probably closer than you think to nice, clear water.

[wolfcue]

I added more chlorine and brought it up to 20 ppm. I will keep you posted as to what happens.

Thanks
Peggy

[wolfcue]

I have another question. Since starting the shock treatment my ph reading has gone down from 7.8 to 7.3. Is this suppose to happen?

Thanks
Peggy

[duraleigh]

No. No clue why it's doing that but it's better @ 7.3 than 7.8

[KurtV]

I have another question. Since starting the shock treatment my ph reading has gone down from 7.8 to 7.3. Is this suppose to happen?

Thanks
Peggy

Peggy, Have you been using only bleach to chlorinate? It seems from your posts that you are, but I couldn't tell for sure. Some forms of solid chlorine (e.g. trichlor) will lower pH so if you're using that it would explain the pH drop.

At any rate, Dave has you on the right track. Keep up the good work.

[wolfcue]

I did use granulars at first to get stablizer, but once the CYA was up to 35 or 40 I switched to regular chlorine bleach. Before I started the shock treatment we had to keep adding muratic acid to bring the PH down and to get the high AlK readings down.

Peggy

[geordie]

Once you get completely clear and let your chlorine drift back down, refer to Ben's best guess CYA chart in the sticky at the top of the chlorine forum. In your first post you listed your free chlorine as 2.0, but if your CYA is actually 35 or 40, you really do not want to let your chlorine drop below 3.0, ever. That is all it takes to let the algae get a foot in the door. I have my CYA right around 40, and I keep my chlorine about 4 or 5 at all times and it seems to work out pretty well in my full sun pool. Good luck.