Yes, I am using tap water. There is nowhere around here that sells or even uses ro
water systems. I have done a bit of research. My tap water has a calcium level of 180ppm. I tested it alone. The salt we are using states that is make the water 400 ppm
for calcium, and that was if it was added to ro
water. so If I combine the two I am pretty much the level i have. I just had to purchase new salt and I di
not get the High in calcium for reefs salt. We do have or plan to have any hard corals. I hope I am on the right track.