The day I changed my refractometer to a Milwaukee digital salinity meter, changed my life.I’ve ordered one of these which is coming tomorrow. I’m fed up with trying to look through the Red Sea refractometer having calibrated it however many times before getting a reading I think might be reasonable
The only time I actually use it to be fair, is when the Apex salinity probe needs cleaning and goes haywire and I need to calibrate it back again. I calibrate Apex to the refractometer when I’m happy the water is at 35ppt.
I think where I’m heading is back to the Tunze Osmolator for the new tank and I’m going to return the 2nd Apex ATK for a refund and depending on what happens with Neptune support, if I can return the one installed in the S650 I will.Sorry to hear about the Neptune failure - I decided against it when I did my build since it had such lousy feedback. Getting the Tunze into my Apex has worked great for me so far!
The wires are easy to extend if you need to get it in an ideal position. I use an old osmalator as back up to my GHL ATO, it’s never kicked on yet but I’m a bit of a redundancy nut...I only didn’t get the Tunze Osmolator because I didn’t think the wires would be long enough for the new system, but I put it in position yesterday and it does fit. So at the moment I’ll see what happens but I think I’m going to get another Tunze.