Opening numbers....am I doing this right?

tadcpht

Well-known member
Jul 17, 2012
95
Forest, VA
Ok so I opened my pool 2 days ago to find a quite lovely shade of green slime on the sides and bottom. I brushed as much as I could see. I added 16oz of 3% copper algaecide and ran the pump in recirculate for 18 hours. Pool is now mostly blue but very cloudy. I did my initial tests...
FC no surprise 0
CYA under 30
Alkalinity 50
pH above 8

With the CYA being below 30 I added 2x 1lb bags of dichlor shock in hopes to bring CYA up a little and get the FC up.
Also added 1/2 jug of muriatic acid to bring pH down and baking soda for the alkalinity.
Retested today and numbers are as follows:

FC 7.5
CC 0
CYA 55
pH 7.0-7.1
Alka 65

I will not add anymore dichlor seeing that my CYA is 55. I will only use clorox from now on.
I just added about a jug and a half of clorox ~150-160oz. per the math calc to bring FC to shock level of 20.

Am I headed in the right direction? Do I needed to flock the pool for the cloudiness or just let the filter take care of it?
Thanks in advance for the replies.
Tommy
 

Charlie_R

TFP Expert
May 8, 2013
2,156
Mexico, MO
Floc doesn't always work like you would expect it to.

You should be running your pump 24/7, and keeping your FC at appropriate SLAM levels until you can pass the OCLT. Clear water is one of the parameters for passing this.

Your filter will take care of the cloudiness, if you let it.
 

tadcpht

Well-known member
Jul 17, 2012
95
Forest, VA
Also another question.....does DPD powder go bad? I have a small container and its turning black. I bought a new one but would like to use the old one if I can.
 

Charlie_R

TFP Expert
May 8, 2013
2,156
Mexico, MO
It still works. I bought my last refill just before end of season last year, and since I don't have a humidity controlled environment, it too is turning a bit dark. Still works just fine though.
 

duraleigh

Admin
Mod Squad
TFP Expert
Platinum Supporter
LifeTime Supporter
In The Industry
Apr 1, 2007
32,858
Sebring, Florida
.does DPD powder go bad?
The test for whether it is bad or not is easy enough.

Assuming you have some chlorine in your pool, just put the powder (same quantity as always) in the test vial and stir/shake/spin. If it turns pink like it normally does, the powder is good.

It really kills my refill sales to admit but it is most always good for the two seasons that covers the guaranty.
 

aldrichg9

Active member
Sep 1, 2013
36
Terre Haute, IN
I added 16oz of 3% copper algaecide
Since you asked if you are doing this right....
No, you did not need to add any copper to your pool.
It can be a preventative but if I have read pool school properly it is not an effective algae killer.
Copper can also cause staining and/or green hair issues.
Just need to keep it in mind in case you have any issues in the future and to discontinue use.

Copper Algaecides are not typically recommended around here.
 

pwrstrk

TFP Expert
LifeTime Supporter
Aug 17, 2012
4,758
Elverson Pa.
I've never used an algaecide either. Keeping the FC in the proper range for the CYA level is all the algae preventer you need.
 

timerguy

Well-known member
Oct 26, 2013
1,141
Chapin, SC
2lbs of dichlor will add at most 13 ppm cya. It will also raise your fc 15ppm in your 9000 gal pool. What or who are you using to test your cya and your other levels. What percent chlorox?