Help Please

virginreef

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My salinity has dropped significantly an I don’t know why...
3D4CDB9F-E28B-4FF7-98DF-A871E0AB39C8.png
 
Either your ATO failed and added a bunch of freshwater, someone else added freshwster or the probe is out of calibration or the port is flaky. Double check salinity with a refractometeror hydrometer and check the probes calibration.
 
I added RO water to the ATO about two days ago. To do a manual test on the probes, do I need the pouches because I don’t have any.
 
Did you check if the ATO dumped all of the freshwater into the tank?
 
Go with refract, soak Probe in RO water and if possible calibrate the refract. If in doubt, take a water sample to LFS and see what reading they get
 
1.022 is approx 30.6ppt so it looks like your probe is working correctly. Some how your top off has added too much RO water. Is your sump level that you top off into, does it look a little higher? Also look at your temp, has dropped by almost 1 degree.

32.6ppt = 1.0246sg
29.8 = 1.0224sg

And you measured 1.022 on the refractometer. To me probe is good, ATO might have added too much.
 
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If not ATO, then another liquid might have been added. Do you automatically dose Alk, Ca etc. Check those containers. Also how big is this tank?
 
1.022 is approx 30.6ppt so it looks like your probe is working correctly. Some how your top off has added too much RO water. Is your sump level that you top off into, does it look a little higher? Also look at your temp, has dropped by almost 1 degree.

32.6ppt = 1.0246sg
29.8 = 1.0224sg

And you measured 1.022 on the refractometer. To me probe is good, ATO might have added too much.
It doesn’t look like it’s tilt or anything like that.. also my ORP has fallen off. It use to be on the display but it’s not any more... the probes don’t seem damaged or anything like that

image.jpg image.jpg
 

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