I'm currently waiting for my Apex to be delivered. And I'm now wandering where to put the probes in my sump. I was thinking of the chamber where the overflow comes in because in that case you measure what is coming from the display tank. On the other side when I turn my return pump off and on there will be some bubbles coming in this chamber . the other chamber that is possible is the one with the skimmer, but it is also possible that there are microbubbles there.
What is your point of view of this?
What is your point of view of this?