What's the alk? When I'm having problems it's sometimes something else but then again it's usually the alk. Low nutrient systems need pretty low alk. I'd shoot for 7.5ish and steady. More pop may help too as well as good quality amino acid.
You getting any algae growth from it? I seem to be on the edge of algae when I have the dosage correct. A bit more and algae, less and less growth and color.
I used acro power with good results. If I overdosed a bit I'd get algae which is how I judged the dose. If algae started I'd back off. Seems like you need to add to your dose. 500g is a lot to manage.
thats the thing I really dont care for the fish i likes the purdy sticks but i am trying to find a school of blue eye cardinals and a school of blue reef chromis
That's a good solution - If fish aren't your thing, then schools of one or two kinds will add life/movement/poop to your tank and keep the focus on the corals.
thats the thing I really dont care for the fish i likes the purdy sticks but i am trying to find a school of blue eye cardinals and a school of blue reef chromis