Hey guys - being a NJ pool owner over the age of 50 - there is always that time in late May / early June where I once again have to re-learn everything I had "down pat" last season. 
Sunday early afternoon we opened our above ground pool and it was green (hole in cover). No biggie - I raised the water level to the wall skimmer level, turned on the pump and whipped out my Pool Calculator TFP app to start my SLAM.
My starting chlorine was obviously 0 and I input my CYA at 0 as well. (Last year my CYA was 60 but I had forgotten this.)
The Pool Calculator app returned a SLAM level of 24 ppm and I didn't blink - I just added 4 gallons of 12.5% bleach to get my FC at 24 ppm. Pool started to clear up in an hour.
This afternoon (Monday) I tested the water and the results came back at FC 8.5 ppm. I threw in 2.5 gallons of 12.5 chlorine.
After comparing my Pool Calculator app to the web site, I realized I had SLAMMED my pool with way higher levels of chlorine than needed. (Assuming a CYA of 20ppm - my SLAM should be 10 ppm.)
My first question is this: No one is going in the pool yet - water is too cold and it rained today. Besides causing extra wear and tear on my liner (which is already faded), any harm in adding more chlorine than the SLAM calls for? I've rationalized my mistake by thinking that the levels will just be in the SLAM zone longer while the pool is unattended.
Today I tested my CYA - test read 0. But I remember from a few years back that the CYA test kit that comes with the the Taylor kit is not that accurate at low levels - So I may have as high as 20 ppm CYA.
Based on that, I assumed my CYA was at 20 ppm. Using the Pool Calc app, I added about 3.5 lbs of stabilizer into cheese cloth balls and hung the "balls" in front of the output jet.
Assuming my CYA will be ~50 soon, my SLAM now should be 20 ppm.
My second question - anyone else find the Pool Calc app sometimes buggy on the iPhone?
Thanks guys!
Sunday early afternoon we opened our above ground pool and it was green (hole in cover). No biggie - I raised the water level to the wall skimmer level, turned on the pump and whipped out my Pool Calculator TFP app to start my SLAM.
My starting chlorine was obviously 0 and I input my CYA at 0 as well. (Last year my CYA was 60 but I had forgotten this.)
The Pool Calculator app returned a SLAM level of 24 ppm and I didn't blink - I just added 4 gallons of 12.5% bleach to get my FC at 24 ppm. Pool started to clear up in an hour.
This afternoon (Monday) I tested the water and the results came back at FC 8.5 ppm. I threw in 2.5 gallons of 12.5 chlorine.
After comparing my Pool Calculator app to the web site, I realized I had SLAMMED my pool with way higher levels of chlorine than needed. (Assuming a CYA of 20ppm - my SLAM should be 10 ppm.)
My first question is this: No one is going in the pool yet - water is too cold and it rained today. Besides causing extra wear and tear on my liner (which is already faded), any harm in adding more chlorine than the SLAM calls for? I've rationalized my mistake by thinking that the levels will just be in the SLAM zone longer while the pool is unattended.
Today I tested my CYA - test read 0. But I remember from a few years back that the CYA test kit that comes with the the Taylor kit is not that accurate at low levels - So I may have as high as 20 ppm CYA.
Based on that, I assumed my CYA was at 20 ppm. Using the Pool Calc app, I added about 3.5 lbs of stabilizer into cheese cloth balls and hung the "balls" in front of the output jet.
Assuming my CYA will be ~50 soon, my SLAM now should be 20 ppm.
My second question - anyone else find the Pool Calc app sometimes buggy on the iPhone?
Thanks guys!
