I am wondering how much Kalk to add to my avast Kalk reactor. I am hoping to only have to top off every 2 weeks and clean it once a month. Trying to figure out how much Kalk to put in so I am not wasting a ton or alternatively not having enough. Tank is a cadlights 50 long. Tank does not have a high demand, lots of nems zoas and 10-15 Lps frags that’s are growing out