Frogspawn and hammer corals losing head
Well, my frogspawn and hammer corals are dying.
They keep losing one head per day. It is not brown slime but shrink and fall off. I notice this problem after i start doising my vodka. I started out a very small amount but increase the dosing over a week.
I have stopped the dosing now but they are still dying. Someone told me that it is because my potassium is low, is it true? I am not sure what is going on anymore.
All my other corals are doing fine except for brain corals but I think they are being picked by the angel fish.
Any suggestions of what i need to do. My water parameters are
Mg: 1380 - 1400
Alk: 10
Calc: 420-440
Nitrate: 15 (I knows it is high but i has been like that for long time)
ph: 8.2 (test kit) 8.7 (ph probe, calibrate it twice and still the same result, probably broken probe)
Potassium: no idea because no test kit
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