Apex salinity

Neptune

Mast33

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Hey everyone. I am having issues with my apex salinity probe. It seems I have to turn upside down daily to release any bubbles bubbles it goes back up to 34 but within half hour drops to 28 and seems to keep dropping. I got my hanna and that said 1.026, my refractometer says 1.027 and the instant ocean hydrometer says 1.026. What is going on with the Apex Salinity probe. Why does it constantly drop. Do orp, ph have anything to do with it.
 
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PeterC99

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It is in the sump area where protein skimmer is. I have the pro clear aquatics 4 in 1. And there were holders already there for probes so we used those
Had to move my salinity probe to the return section of my sump from the skimmer section because I got too many bubbles from the skimmer, interfering with probe readings.
 
Corals.com
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