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Yesterday my FC was 8 and CYA 70, little too high, Today FC is 0,5! CYA still 70. How can FC the day after be 0,5?. Almost no use of the pool. What does slam level in the table mean? I have seen people write about FC be higher than 3-4 can be harmfull for body. Does the apropreate CYA level...

As I am now trying to NOT have a salt pool the salt level is not longer important. I checked it with reference salt water and i saw my meter showed 1200 when it should show 2000. But forget about that. 2 days after my FC was 3,5. I filled 1 liter sodium hypo, after 8 h I had 4ppm. The day after...

I did take out about half of the water and filled up. Then my values was like this: PH 7,8 salt 1870 (can't understand it is higher now) 30 degreas FC 2,5 CC 0 TA 60 CH 160 CYA 40 Then I added 1 liter sodium hypochlorite Now values is like this: PH 8,0 salt 1900 30 degreas FC 5 CC 0,5 TA 60 CH...

What I can see, you can not see free chlorine on the app so I don't understand what use I can have of the app. Now I have about 30m3 in my pool. My FC is 5, if I should like to raise it to 7, can you tell me how much sodium hypochlorite 10% I have to add?

I go o Poolmath but I don't see anything to download??

Is Sodium hypochlorite 10% what I should use. How much could I start with and how much and how often after that?

But I have 2 tanks together 2400 litre. And I have a submersible pump 11,5 m3/h which I can use in pool and in tanks, I have started today.

ok I see, that is not the whole picture. I have 2 tanks together 2400 litre, when they are filled I can take water out and I can use a submersible pump 11,5m3/h. Same pump I can use to take water out from pool

To measure salt i have an instrument. I wrote that I use 25 kg with no rain and 33 with rain. The last 2 months, 2 times rain

Do I have a slow feed pump?

It is a problem for me to a drain because we have a weak water pump from our area well. I can try to do it very slow. Yes I did the dilution test and it was 100, not higher You are correct about the pump, it is more noisy now when it runs. Do you have an idea what had happened? Can I go on with...

Thanks for your help. I have checked and found that I have used 550kg salt during 18 months. That is 30kg/month. I live in Thailand, we have rain period june-november 6 months. It looks like 25kg/month the dry period and 33kg wet period. My chlorinator is Emaux SSC15-T This is my data today: FC...

Now and then i have problem with black algeas and that is terrible to treat. I have an idea to change my pool to a fresh water pool since it seems easier to hold chlorin high. My pool is 43 cubic meter and temperature is normally about 30-34 C. I have had to add 25 kg salt every 2-3 weeks...

Thanks for a great explanation!

When chlorinator making chlorine out of the salt, do you say that this will no reduce the amount of salt?

How about your memory? You wrote this to me: "Losing only 0.5 ppm of free chlorine is good. You passed the OCLT. " You say "bad filter media". How can it be bad? Media was changed 2 years ago (zelbrite) What I think is that the media has come out in the pool, but how can that happen? If the...

The only reason I can think of for this problem is that the cloudyness come from filter media. Is it possible that someting could happen to the filter valve? The brand of the filter is Poolrite/Magnapool. Can you tell me what I should look for. I understand that there are lots of pool ecperts at...

I read this on a swedish pool page, I have translated it to english. Is it correct or do you have anny correction? CYANURIC ACID PROTECTS CHLORINE Stabilized chlorine Cyanuric acid is a substance that protects chlorine from being broken down quickly by the sun's UV rays. The disadvantage is...

I think I understand that a CYA at 70 is good for 2 things. It will save my cell and it will save salt as chlorine value will go down slower. I will take care of that but as I understand that have nothing to do with my cloudy water. As I wrote earlier today I have cleaned my pool and filter...

Now I have cleaned the pool and filter. i have also calibrated the filter meter. The first photo calibration, 2nd running pump. But pool still cloudy.

I am rather sure it is not calibrated but it looks like this

This is my meter, I am rather sure it is not calibrated. Photo was taken when pump is running

What kind of acid do I have, I use it to lower the PH. If i should use that to get higher CYA, then the PH will be too low. I will order the acid, I have started to contact a company that have it in their sortiment, but not in stock. I will check this app.

Tested chlorine at 07:30: 8,5ppm

It was cleaned 14 days ago. I don't know the pressure, I don't have a meter. Is that the same that the pool pump will make?

I have this, can I use that?