I’ve had the Apex installed now for just over a week.
I’ve been playing around with the salinity probe to try and get it dialled in. I followed the instructions using their calibration fluid and then when I put the probe into the tank Apex was saying the salinity was around 37-38ppm which is wasn’t.
So I got my trusty Red Sea Refractometer out and used that, and the salinity was around 34-35 which is were it is normally. It did take me around 3 goes recalibrating it each time and I thought there must be an easier Refractometer to use than this so I ordered the DD version for comparison. That was reading 2ppm less than Red Sea!
Anyway, after tearing my hair out i did some research (including reading the instructions!!) and my conclusion is that you add the RO water or 35ppm solution to calibrate, but you leave the water/solution on the Refractometer for 20-30 seconds so it reaches the correct temperature before you take the reading and adjust for calibration.
Then you take the saltwater, and again when you test it you wait 20-30 seconds before taking the reading so it can adjust to the correct temperature. I did this with both Red Sea and DD and they were within about 0.5-1ppm of each other. Well today anyway!
So back to Apex. I thought I’ll ignore the instructions on using calibration fluid and use my tank water instead. I won’t bore you, but basically the part of the calibration were it says put into calibration fluid, I put the probe into the tank. And today it’s reading 35ppm in line with the Refractometers.
So far I haven’t added my 2 heaters, just because I have a Simply Aquaria controller on line already, but I may attach this into Apex over the next few weeks as triple failure backup. I’m also going to add in my UVC and feeder pump. It’s the only thing outside of my sump which has always made me nervous, but one of the excellent things with Apex is that if the leak detector detects water, it will (when ive programmed it shortly) turn off the UVC and feeder pump. I’ve already programmed this onto the skimmer.
The other things it’s been interesting to see with Apex monitoring, is the Ph changes at different times of day from around 7.8 - 8.2 due to the biological changes within the tank during the day. It’s something I’ve never noticed as when I tested ph around the same pm time it was always 8.2. Infact I hadn’t tested it for ages as it was always the same and everything was thriving.
Anyway a few up to date photos...
And look at the size of the Regal Tang. He was only 2 inches when I got him about 18 months ago!
Sent from my iPad using Tapatalk