Hi all.
I've a 200 g marine reef aquarium, for a 3 years old.
My corals, are loosing colour, and i dont know why.
i use Berlin method, Skimmer Turboflotor 5000 twin, Aquamedic
calcium reactor with redsea reefbase aragonite sand,3x250 w HQI,13000k
and over 30000 l/h of recirculation.
My...