I'm too scared to set up mine
Nothing to be scared of, if you have a couple things.
1)ph probe inside the reactor is a must. Calibrate this every 3 months. Especially when or if the reactor starts to dip in the 6.5 pH area
2) Another is a controller attached to the feed pump and regulator with code so that the controller shuts off equipment if the "melt" goes lower than 6.5ph.
3) a good regulator, if you can afford the electronic one, that's a smart buy. I use the original hardware on the Geo Reactor I bought used. I used others but did not like the sensitivity.
4)The drip tray with media for the effluent to drip into is also good to get rid of some CO2.
5) you need a few hours to get the ph inside the reactor literally dialed in. After you have done this a couple times you can do it with you eyes closed.
6) Familiarize yourself with the bubble count. At first one bubble per like 10 seconds till you get the ph stable between 6.51-6.70 is ideal range IME for stability of PH in the reactor.
7) Read the manufacturers notes and familiarize yourself with all fittings bushings and hoses and do leak tests (soapy water on all joints and fittings) on the CO2 lines. I would only open the CO2 a few turns. Don't need to open it all the way.
8) if you don't have any proven fail safes then yes you can run into issues. But if you test them on purpose the day of installation, you will find a calcium reactor is the best option for calcium, alkalinity and some trace elements. Magnesium is tricky. I still have to dose a few ml (6) which is like nothing. Per day. I think mixing more zeo mag like a 1 mag/3 cal ratio would have made me not have to dose magnesium at all.