Been using it for 2 years now.
It really works well, but you have to go slow.
I don't use the normal dosages but started very low and slowly increased while looking very carefully to the corals.
I use almost all the products except zeospur2.
Lately I began with Pohl's xtra, a new color enhancing product.
This made a big difference.
Sponge power really enhances the coral growth.
In my nano I have more nutrient shortage than too much nutrients!!
I change water 10%/week and feed a lot.
Grt,
Robertus.