I use color FX in my everyday feeding.
The colors on my fishes have made a remarkable difference.
I feed my fishes NLS in the morning then Color FX in the evening.
It may be pricy but it's worth every penny imo.
Like it says on the packaging "your fish deserves the best"
But if you want something that is cheaper it'd go with NLS..
NLS does they same also, And it's a tad cheaper than dainichi.