IMM, pest type algae’s and bacteria’s (aka Dino and Cyano) favor unstable water chemistry and metabolically multiply very fast.
That being said, it’s not as much an issue of level, provided your in the traditional ranges, it’s the amount of flux the system experiences day to day.
Salinity, Alk, and temp are certainly those things which must be rock solid at any time and nitrate and phosphate should be both in trace amounts and should not be rising or falling, week over week.
While CA and MG are important contributors to both calcification, they are usually easily managed.
I did experience a few times that a higher ALK (11dkh) did seem to lessen the green stuff.
If you keep everything pinned, the more advanced algae’s populate faster, leaving less real estate for the other crap. At one point in the process, the pest stuff just disappears seemly overnight.
Provided I keep parameters pinned, sand stays white, rocks clean going on 4 years without intervention from me.