High salt levels after treating for algae

Mcaveman

Well-known member
Aug 28, 2016
88
Baltimore Md
In the past month I have slammed the pool twice for what I suspect is algae, both times for 3 days , 1st time just bleach , 2nd time bleach and algaeside .
Water was clear but my FC was coming in low again. Now the salt generator is saying high salt and my Tayler salt kit also says it’s high salt but I haven’t added any , would the algae side chemical cause this?

current levels
FC 9
Cc 0
Alk 90
Cal 300
Cya 65
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
29,063
Northern NJ
Pool Size
35000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
How much liquid chlorine did you add during your SLAMs?

Every gallon of LC you used added 3.7 ppm of salt to your pool.

BTW, your CYA is 70. We round up.
 

Mcaveman

Well-known member
Aug 28, 2016
88
Baltimore Md
It’s a large pool so each slam was probably around 40 gallons give or take . Also 6lbs of sodium bromide(way more than needed wife miscalculated)
 

JamesW

TFP Expert
Mar 2, 2011
28,225
Is the heater on?

What is the water temperature?

What is the actual salinity?

What are the diagnostic readings?
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
29,063
Northern NJ
Pool Size
35000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
The LC added as much salt as 3 to 4 40lb bags of salt.
 

JamesW

TFP Expert
Mar 2, 2011
28,225
If the 400,000 btu/hr is on, the temperature in the cell will go up by about 17 degrees and the cell current will go up by a lot.

If the cell current hits 8.0 amps, the high salt light will come on and shut off the cell.
 

Mcaveman

Well-known member
Aug 28, 2016
88
Baltimore Md
Added the bromide per my pool builder tech but we got the calculations wrong , not using the heater water is 87 , it’s been hot here and will be all week, pool is full sun all day .
 

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Donldson

TFP Expert
LifeTime Supporter
Jun 12, 2009
5,150
NW Ohio
Added the bromide per my pool builder tech but we got the calculations wrong
Did your pool builder tech intend to turn your pool in to a bromine pool? Because you have a significant enough bromide bank now that your pool is no longer a chlorine pool. Which does explain the decreasing chlorine bromine levels, since bromine is not protected from sunlight by CYA it's burning off quickly.
 

Mcaveman

Well-known member
Aug 28, 2016
88
Baltimore Md
The FC is holding its 9-10 level with full sun 90 degrees today and the intellichlor is blinking high salt . Is that still making chlorine?
 

JamesW

TFP Expert
Mar 2, 2011
28,225
80 gallons of 12.5% LC would add 366 ppm of salt.

What was the salinity reading before adding the liquid chlorine?

I would not add any more sodium bromide because it is going to cause you nothing but problems.
 

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