Still Learning
- Thread starter ddmckmle
- Start date
I have bleach that is 8.25% how much do I put in to raise the FC to where is needs to be whether I slam or just adding to keep FC normal.
Pool Math ( link at top of each page) is a great tool. Put in pool volume at top. Set current and desired FC. Right on same row add the % of bleach you are using. It will calculate how much you need to add.
DeanP66
0
If you go to top of the page and click on the Pool Math button, you can add your gallons near the top left (6000). Then under FC, use the left box to type in your starting FC and the right box for your target FC. Make sure and choose the correct strength (8.25%) and it will tell you exactly how much. So, if you punch in 3.6 on the left and 8.0 on the right box, it should tell you to add 40 oz. liquid chlorine or bleach.
To get to shock level for your SLAM, you need FC at 20 PPM because that corresponds with your CYA of 50. So from 3.6 to 20, you need about 148 oz.
I would stick to using the 10 mL sample for testing your FC. Just count each drop as .5 instead of .2 and you will save a lot of reagent chemicals. Otherwise, they will go quickly, especially if you have to SLAM and test several times a day.
To get to shock level for your SLAM, you need FC at 20 PPM because that corresponds with your CYA of 50. So from 3.6 to 20, you need about 148 oz.
I would stick to using the 10 mL sample for testing your FC. Just count each drop as .5 instead of .2 and you will save a lot of reagent chemicals. Otherwise, they will go quickly, especially if you have to SLAM and test several times a day.
At the bottom of PoolMath on suggested FC levels it says for shock 20 and Mustard Algae 29.
DeanP66
0
Looks pretty clear to me. I would just try a regular SLAM at FC 20 and see how that goes. I don't have any experience with mustard algae (thankfully), so maybe someone more knowledgeable will chime in.
- Apr 23, 2017
- 2,400
- Pool Size
- 22000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Hayward Aqua Rite (T-15)
From this pic the pool looks great. I suppose a shock won't hurt but thats up to you and the experts. Your doing great!
Yes, the SLAM process is needed because there is visible algae. Don’t worry about the mustard algae for now. The process is the same right now either way.
The pool doesn’t look too bad and the SLAM should go fairly quick. No shortcuts though. Follow the process to the letter.
The pool doesn’t look too bad and the SLAM should go fairly quick. No shortcuts though. Follow the process to the letter.
Todays numbers
FC 2
CC 0
PH 7.6
TA 120
CH 120
CYA 50
OK I followed the process for the slam and raised my PH to 7.6 and now my pool is very cloudy can barely see the fist step on the ladder. Last night I used Soda Ash around 6 pm and now I can't swim today. I am going to raise the FC to 20 tonight to start the slam. Now my wife is going to be mad that we can't swim.
FC 2
CC 0
PH 7.6
TA 120
CH 120
CYA 50
OK I followed the process for the slam and raised my PH to 7.6 and now my pool is very cloudy can barely see the fist step on the ladder. Last night I used Soda Ash around 6 pm and now I can't swim today. I am going to raise the FC to 20 tonight to start the slam. Now my wife is going to be mad that we can't swim.
I’m a little surprised you haven’t brought the FC up to SLAM level yet. Or did you do that and it went down to 2 overnight? For the pH, I thought it was already in the 7’s? Use your brush and mix the water around. If the cloudy is is from the Soda Ash, that should help
I did not want to slam it yet because the wife wanted to swim today with the grand kids. the prereq for the slam said to raise PH to between 7.2 - 7.5.
It is safe to swim in the water if the FC is at or below SLAM levels. You’re at the other end where you don’t have enough FC to be safe. With CYA at 50, your minimum FC is 4 and ideally between 6-8. Your at risk of not killing the bad stuff in the water right now.
Add FC to at least that level. Chlorine kills stuff.
If the cloudy is from the Soda Ash, then stirring to mix will help. Your filter will help if the cloudy is from other stuff suspended in the water.
If the cloudy is from the Soda Ash, then stirring to mix will help. Your filter will help if the cloudy is from other stuff suspended in the water.
Well I have started the SLAM got the FC to 18 added more waited 1 hr checked it again was 13 added more bleach the amount PoolMath said to add and now it is back to 18 seems like it does not want to get to 20.
It’s ok. Just keep testing and adding like you are doing. Maybe there is a little more water than you are assuming.
The last 2 time I check the FC was 16 I added more bleach both time but this time I checked the PH and it was 8.0.