I've been using pure 2 part (3 part) for about 2 1/2 years. Before that I used a mixture of Kalk and 2 part. Gave up the kalk as a bad habit. Never owned a calcium reactor, seems complicated a hazardous to me.
Now I use a Profilux controller with doser, but any accurate pump and timer will do.
Usually end up checking ca, alk and mg every 3 or 4 weeks. It's pointless to check it any more often once you get the system "dialed in".
One day I'll try the FM additives just to see if they do anything. For now I just dose Iodine, and a small amount of Iron for my Macroalgae.
Rob
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