Opening with very high ph and mustard algae

[Watermom]

Yes. Do a full set of readings and post all your numbers and then somebody can help you go from there.

[greenwich3]

cl. No reading
cya 35
ph. Past 8.0
Calcium Hardness. 150
TA. 80

Also, I have a sand filter.

[PoolDoc]

That's a big pool. Trying to handle it with 1 gallon jugs of 6% bleach will be a pain: 1 gallon would add only 1 ppm of chlorine!

• Do you have any chemicals on hand? If so, EXACTLY what are they?
• Is the pool covered? If it is, leave it covered, till you have chemicals AND a plan ready to go.
• Do you have access to commercial liquid bleach OR 100lb containers of granular calcium hypochlorite?
• What is the make / model of your filter & pump?

If your pool is NOT covered, and you have access to a Walmart and Lowes / Home Depot, I'd recommend adding 15 gallons of bleach in EACH evening. Add 2 gallons of muriatic acid (link to guide in my signature!) daily, but at least 30 minutes from when you add the bleach. Once we have more info, you can work out an alternative.

If possible re-test chlorine 1 hour after you add the bleach for the first time. If you had higher CYA last fall, you may now have ammonia in your pool. Dealing with that on a 52,000 gallon pool will take more than bottles of bleach, unless you want to go to multiple Walmarts and buy out each one's stock of plain bleach!

[greenwich3]

Thank you for your help. Since I found you in the winter, I have been stocking up with chemicals. I do not have a cover as it died in the fall and that is how I found your site.

I have dichlor, lots of bleach, 20 gallons of liquid chlorine, borax and baking soda.

My sand filter is a large sand filter by Hayward and a 2 1/2 HP motor by Jandy. The filter is new.

[greenwich3]

Thank you water mom and doc. I am doing the suggestions you gave me and will do the reading again as I just got the filter going and added bleach.

I just paid the $14 to join so I do thank you for your help and hope to use this forum often.

[greenwich3]

An hour after adding chlorine and bleach, my chlorine level is:

FC. 9.5
CC. 2.5

This was my first time using the k-2006c so I will have to learn how to use it correctly.

I guess I will see how things look in the morning.

Thanks!

[PoolDoc]

Get some acid -- you need to get the pH down below 8.0!

Also, we'll need make/model on the pump and filter in order to offer better advice.

[greenwich3]

Water looks 100 percent better today and is very cloudy but no longer disgusting. I will get reading after work and buy acid after work. I ran the filter on recirculate last night but changed to filter this morning.

Hayward Sand Filter. S270T2. Pro Series High Rate Sand Filter

Jandy 2.5 HP Uprate pump. MHPU Series - could not find model number yet

Thank you again for helping me!