Your levels look about like mine. I also use KENT phytoplex, essential elements, and tech i additives. I don't target feed them very often at all. The food I use is frozen brine, myisis, formula two. Have started to feed my own mix now I take 3.5oz mysis, 16oz brine, 16oz prime reef, 7oz formula VHP, 4 oz garlic guard, Blend it all up and re freeze it in serving size so I can throw a cube in a cup of tank water then just pour it in works great.
Long to short I don't know why but in a little over a year 1 is now 4.