Alkalinity High Calcium Low

[Quagmire]

380 Ca isn't low its just about right.I think it was Calfo who said a coral that uses 10ppm to grow dosn't care if its from water with 360ppm or 450ppm.But most ppl like to have more Ca due to either thinking they have to have over 400ppm,or they prefer to have a higher Ca so it dosn't drop too low between doses.As for Alk,since your useing a 2 part,just dose the Ca and not the Alk untill it comes down to where you want it.If you have been trying to raise your Ca but it won't go up,this may help.But also test your Mg,you want that around 1300-1400ppm.If its low Ca will be hard to keep stable.