oh. I miss read the post.
I saw when to add my CuC.
that's the first thing you do.
To answer you question about when to add more...do it as you see fit.
If you want more, go ahead and add half dozen at a time.
It really all depends on how many fish you have, and how much feeding you do.
Just remember that it is complete myth that you need a large CuC.
All it does is create more competition for scraps, and will eventually lead to deaths, which create waste toxins.
These so called "packages" sold on line are grossly over kill.
You will find that when you add tons of CuC they will balance them selves out, eventually it will stabalize and you wont see the population rise or fall much after that.
My 125DT has a dozen hermits, and a dozen snails. Plenty to keep it clean.
I wipe the glass with a quick pass from the magnet every other day, and that's about all I have to do besides weekly 5-10% WC and daily light feeding.