Hi All,
Long story short within the past 4 days I have seen the salt level read from the IC drop from 3750 (read relatively consistently for 2 months) to 2750 (-1000ppm). My Aquacheck test strips (not expired) read at about 6.4 or 3290ppm. I'm wondering if the acid injection may have impacted my SWG.
About two months ago I installed a Stenner 85MHP17 for acid injection *AFTER* the heater check valve and *BEFORE* the IC20 (like the IntelliPH would have been installed). When I installed the Stenner I also cleaned my IC20. I have since been running the Stenner with a 3:1 dilution of 31%MA out of a 5g container for about 5 to 7 minutes per day. The flow rate while the stenner is running is about 35gpm based on reading my FlowVis. I check my chemicals around every 3 to 4 days and have maintained 7.5 to 7.7PH for the past two months.
My pool temp was pretty warm (being summer with the solr heating) at 85 but has recently trailed off to 79 degrees at the peak during the ay lately (October is when I start to see the solar be less effective). My CH has always tended to be on the high side at about 500ppm.
Last full set
10/11/2017 7:30AM
79 degrees
PH 7.5
FC 7.5
CC 0
CYA 70
TA 70
CH 500
IC 3750 ppm salt
Borates 0
10/14/17 9:00AM
74 degrees
PH 7.5
FC 8
CC 0
IC 2750 ppm salt
AquaCheck 3290
I pulled the IC off and DID notice some calcium buildup (not significant but certainly some) on the plates but didn't have any spare acid on hand to do an acid clean. I found this a little odd since before the Stenner was installed I hadn't done an acid cleaning and didn't have this much calcium buildup. I would usually let the PH rise to 7.8 then drop it down to 7.4 or 7.5 (sometimes 7.2 if I was trying to get my TA down which does have a tendency to rise over time). If anything I would have expected the Stenner to be cleaning off the cell and maintaining way better PH which would have prevented the scaling.
I plan on doing an acid wash on the cell but my initial thought when I saw the reading was that running the stenner for 7 minutes was too long possibly and may have damaged the IC (I really doubted this since 35gpm seems like a lot of flow relative to the 3:1 diluted 1.5ounces per minute). Then when I opened the cell and found some calcium I was even more confused because I was expecting it to be pristine.
Any thoughts?
* Is 7 minutes too long? Should I break it up like 3 minutes the first hour then 3 minutes another hour and 1 minute another hour?
* Calcium deposits on SWG after installing a stenner?
* Another note I'll make is that I have been turning the IC down since 9/25 (I usually need to run it at 100% for the 8 hours of runtime during the summer months and then drop it pretty dramatically during the winter). Since 9/25 I have dropped it to 60%.
Thanks!
Long story short within the past 4 days I have seen the salt level read from the IC drop from 3750 (read relatively consistently for 2 months) to 2750 (-1000ppm). My Aquacheck test strips (not expired) read at about 6.4 or 3290ppm. I'm wondering if the acid injection may have impacted my SWG.
About two months ago I installed a Stenner 85MHP17 for acid injection *AFTER* the heater check valve and *BEFORE* the IC20 (like the IntelliPH would have been installed). When I installed the Stenner I also cleaned my IC20. I have since been running the Stenner with a 3:1 dilution of 31%MA out of a 5g container for about 5 to 7 minutes per day. The flow rate while the stenner is running is about 35gpm based on reading my FlowVis. I check my chemicals around every 3 to 4 days and have maintained 7.5 to 7.7PH for the past two months.
My pool temp was pretty warm (being summer with the solr heating) at 85 but has recently trailed off to 79 degrees at the peak during the ay lately (October is when I start to see the solar be less effective). My CH has always tended to be on the high side at about 500ppm.
Last full set
10/11/2017 7:30AM
79 degrees
PH 7.5
FC 7.5
CC 0
CYA 70
TA 70
CH 500
IC 3750 ppm salt
Borates 0
10/14/17 9:00AM
74 degrees
PH 7.5
FC 8
CC 0
IC 2750 ppm salt
AquaCheck 3290
I pulled the IC off and DID notice some calcium buildup (not significant but certainly some) on the plates but didn't have any spare acid on hand to do an acid clean. I found this a little odd since before the Stenner was installed I hadn't done an acid cleaning and didn't have this much calcium buildup. I would usually let the PH rise to 7.8 then drop it down to 7.4 or 7.5 (sometimes 7.2 if I was trying to get my TA down which does have a tendency to rise over time). If anything I would have expected the Stenner to be cleaning off the cell and maintaining way better PH which would have prevented the scaling.
I plan on doing an acid wash on the cell but my initial thought when I saw the reading was that running the stenner for 7 minutes was too long possibly and may have damaged the IC (I really doubted this since 35gpm seems like a lot of flow relative to the 3:1 diluted 1.5ounces per minute). Then when I opened the cell and found some calcium I was even more confused because I was expecting it to be pristine.
Any thoughts?
* Is 7 minutes too long? Should I break it up like 3 minutes the first hour then 3 minutes another hour and 1 minute another hour?
* Calcium deposits on SWG after installing a stenner?
* Another note I'll make is that I have been turning the IC down since 9/25 (I usually need to run it at 100% for the 8 hours of runtime during the summer months and then drop it pretty dramatically during the winter). Since 9/25 I have dropped it to 60%.
Thanks!