I hate mustard algae

[topless]

This was the only time I used the copper based algaecide, and my last. I've been using some that I bought from Sam's Club that the main ingrediant is diemethyl benzol chloride (I read it, but doubt if I spelled to correct). Prior to that was the Bioguard algaecide and Banish. I'm not satisfied with any of the products since I can't keep the algae out of my pool.
According to the bleach calculator, I should add 2-1/2 gallons to raise my FC over 20ppm.

[KurtV]

topless,

According to the Best Guess table, for your level of CYA (150 ppm according to your first post) you need to get the chlorine to 25 ppm to shock. You'll need to keep it at that level until the algae is gone and the water will keep the same level of free chlorine overnight.

Testing several times a day and adding bleach to return the chlorine to shock level will give you the best results. At a minimum, test and chlorinate in the morning and evening but three times a day will probably get this problem cleared up more quickly.

Best of luck.

[topless]

Thanks for the help. Unfortunately my start is delayed by rain today. I've got 8 gallons of bleach and my Bioguard test kit all ready to go, but I closed the cover to keep the rainwater out. It's supposed to stop by tomorrow.

[Simmons99]

Also you need to brush the pool daily.

[topless]

I'm hoping my 234 test kit comes today. I've been using my standard test kit, but it's so limited.
I recalculated my pool volume and it's more than I thought. It's a semi-kidney shaped gunite, but it's volume is 18,000+.
So far I've used 8 gallons of bleach since Sat., vaccumed to waste 1 time, and brushed at least 2-3 times per day. I've run my Polaris after brushing, to pick up dead bugs and tree debris from the pool bottom. As soon as I switch back to the side jets, I get foam. I've had foam ever since I put in the last algaecide about 2 weeks ago. It very strange, it comes and goes. At times it almost covers the entire pool, other times it's completely gone.
I'm about ready to just drain down the pool 2/3rds and start over. Maybe that way I can get the CYA level down enough to get the chlorine to work.
It appears my FC is over 10ppm, about the same as my TC. ph is still 7.2, but I'm not sure about anything else until the 234 test kit comes.

[duraleigh]

Draining 2/3 of your pool, if water is cheap, is a good option. You will dilute all the products that have been tossed in the pool, get your CYA to a manageable level, and reduce your calcium which is fairly high.

If you choose this, coincide it with the arrival of Ben's kit. You're gonna' be amazed at how suddenly accurate and precise you'll be. You will have your water manageable from the start and you'll be able to keep it there.

[topless]

I needed a part for my Polaris, so I took a water sample in to be tested. The guy stuck in a test strip and said the chlorine was too high and would throw off all the other tests. So, I guess I'm done until I get my 234 kit.