Originally Posted by
skynite
I also did the same thing with my ATO. I added a line "If Salt < 34.5 Then OFF" today. I'm not really sure what will happen over time.
My salinity probe failed and Neptune RMA'ed me another probe, but for the month I was without the probe I didn't realize that my salinity was falling so much. I tested weekly with the Milwaukee Digital Salinity refractometer but i found out that it has a +/- .002 accuracy which would mean your 1.026 reading could be between 1.024 and 1.028. And it didn't help that I wasn't calibrating the Milwaukee every time I was using it.
After calibrating my new probe with the Neptune calibration fluid and I checked the solution and my probe was reading 34.9. But when I put the probe in my tank and it would read 33.1. After reading the comments above I too noticed salt creep in places and my skimmer is on the wet side. Could that be a contributing factor to why the salinity went so low?
After calibrating the milwaukee I was seeing 1.025 SG and then toggling the range in the Milwaukee from Specifc gravity (SG) to PPT my result would be 33. I didn't realize how big of a range specific gravity is when compared to PPT. 1.026 SG can be anywhere from 34.4 PPT to 35.7 PPT.
Needless to say, I may be adding more salt water weekly or better yet making it automated.
If I programmed a PMUP pump to add salt water to the sump like below:
Fallback OFF
Set OFF
If ATO_LO OPEN Then ON <--- If my ATO sensor low is dry then ON
If ATO_HI CLOSED Then OFF <--- If my ATO sensor High is wet then off
If SALT_RL OPEN Then OFF <--- If my saltwater reservoir is low or empty don't run the PMUP pump. Also send me an alarm.
If Salt < 34.5 Then ON <--- If my salinity probe is below 34.5 then on.
If Salt > 35 Then OFF <--- If my salinity probe is above 35 then off.
When On > 005:00 Then OFF
Defer 000:10 Then ON
Defer 000:04 Then OFF
Does this make sense to you all? Can this work or would I run into other problems?
thx
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