That will probably be me i just bought a dastaco Extrema A4 for my 500 gallon sps dominated tank, always wanted one of these units and i got one at a great price just hope its not to small for my beastYou should set the power to a timer or apex and vent once per day for normal use. This prevents inert gasses from building up and increasing the ph. You can vent more often and this will increase the capacity of the unit somewhat. They recommend more ventings if you are maxed out on the dial and your alk is still dropping.
I would swap out the rotor and tubing inside the peristaltic pump every year max to keep the unit nice and happy. Also make sure this pump is mounted at the height of the top of the unit. Don't set the alk dial at 1 or it seems to throw alarms. I prefer 2 ventings per day to keep the unit happy as well. If you do these basic things the unit seems to run almost flawlessly. Hope this helps. Here are the alarms. (Scroll to the bottom for US)Sorry. I never got back on this thread. I get a long pause alarm from time to time. I assume it is Co2 build up and once I turn the unit off for a bit it goes away.
It’s an awesome Co2 reactor and paired with Alkatronic it is nearly bullet proof