Is my salinity swing within reason?

[N2950H]

I have a Tunze Osmolator on my Waterbox 80.4 and just recently hooked up my Apex to start tracking basic parameters. I noticed a bit of a salinity swing which seems to be within reason as far as livestock health goes, but it's more than I expected given the fact that my ATO kicks on often, sometimes every 5-10 minutes.

For example, over the last 24 hours it ranged from 33.6 ppt (1.0253 sg) to 34.1ppt (1.0257 sg). Realistically that's minimal, but I wanted to see what kind of swings you guys saw on a similar sized system. In my mind it would have theoretically been a straight line because of the ATO.

 

[LARedstickreefer]

Your ato shouldn’t be swinging your salinity that much. Where do you have the sensor located?

Edit: I misread your numbers. Thought they were 1.025 and 1.027.

 

[N2950H]

My ATO level sensor is in my return pump compartment.

 

[Billldg]

This is mine, I don’t pay to much attention to the swing as it’s temp related, as long as my salinity stays within reason.

 

[N2950H]

Ah, ok. That makes sense. And when I compare my salinity and temp charts, I see the correlation. I don't think this is something I should be concerned about, but at least now I know what is causing. it. Thanks, guys!

 

[Sailingeric]

Why is your ATO kicking in every 5 or 10 minutes. That seems excessive. Mine does come on several times a day and after an initial fill, it will do another shorter blast as the water between the sump and tank works its way around the system and "levels" out.

 

[N2950H]

That's a great question, one I wish I knew the answer to. It's not always 5-10 minutes, but sometimes it is.

 

[ca1ore]

Yup, salinity changes as a consequence of temperature. Apex conductivity probe also has some 'slop' in it.