Hello, i have been struggling with no3 and po4 since I got the tank(6 months), they are always 0. My corals are getting paler by the day, one larger birdsnest colony started to die in the middle. Its a 400L aquarium and i only have 2 small fish, have been waiting for my fish order since may. Im getting desperate so is it ok if I dose easy-life nitro (no3) freshwater plant fertilizer in my reef aquarium?