still have green pool

Ok, I posted 'the green pool syndrome a few days ago'
Here is my status:
Since my CYA was 120 I decided to drain the water half way down.
My chlorine level was at 25 for two days and still is green
FC=25
Alk=100
PH=7.8
CYA=120

I noticed most of the algae is on the bottom cause
I brushed till i can't brush anymore

So I am filling my pool bacl to the normal level now. Just added a 32 ounce bottle of polyquat, and have the filter on recirc.from the bottom drain to dilute up the algaecide.

I keep brushing, wife thinks I am crazy adding good water to algae water but it's not safe to completely drain the pool.

I will check the levels later tonight after pool fills

16x32 vinyl pool= 21000 gallons

I will try some clarifier later.

And yes I replaced out DE filter last fall with a Hayward 250 lb sand filter

Hopefully my CYA goes down

ANy other thoughts

Mike

I would add nothing but bleach until the water clears up, just my 2cents. good luck

Are you keeping your Cl level at 25 all day, or are you letting it yo-yo up and down? It may very well take several days to get it all cleared up, so your best bet is to forget the clarifier and just add enough bleach to go back up to 25 ppm. If you can test and add more 2-3 times daily, that'll even help it clear up faster. Keep brushing daily, and keep your filter running 24/7 until it clears up. Be patient, and it will clear!

Janet

Will do, I am hoping the cya drops form the dilution method

Its hard to see where I have brushed the algae

Will the polyquat and the high chlorine kill the algae enough to see the stuff on the bottom?

The high chlorine will. As the algae dies, your pool should go from green to a cloudy blue. At that point, hold your shock level a couple of days longer, then you can let it start drifting back down to your maintanance level. Leave your filter running--that's what will get it all out of your water.

Janet

Just curious but why did you go from a D.E. filter to a sand filter? This is going to make the cleanup process a lot more time consuming and tedious

Brushing the bottom will help mix the algae up so it can be attacked more evenly by the chlorine and picked up throught the skimmer.

But vacuuming the bottom might help to remove the dead algae as its killed off.

Vac to waste and not to your filter.

Save the polyquot until the mess is cleaned up and chlorine levels are stabilized.

Even then you may not need it ( other than a double dose for winterizing ). Lots of folks here do not us any algecide. Proper chlorination will do all that is needed to control algae and other contaminants. Having said that there are well experienced folks here that use polyquot as a preventative. Sort of like using a belt and suspenders. Suit yourself. But don't waste it now. You'll be vacuuming and dumping a lot of water and your polyquot with it.

When I got my pool along with the house we bought, it had about the same level of CYA as your 120. Had to dump almost half the water twice to get it to 40. Until I did that I had the tablet auto chlorinator going flat out to try to stop the algae blooms. All the time it was add more and more CYA and making it harder to keep enough chlorine to prevent the algea ... the previous owner had been doing that for years. Bleached the h*** out of the liner in the process. He also poured 3 or 4 carboys of pool store chlorine in at a time. He really shmucked it.

Anyway ...now down to about 40 CYA and using nothing but bleach for a year without a problem.

You'll get there. Good luck.