A friend of mine runs a store here at Guatemala and he is constantly supplying the reef market with freshly collected Natural Sea Water from the deep water región. About 25 miles from the shore. I have been using this and wow! Nitrate 0 phosphate and silicate 0. Low alcalinity about 7.6 degrees. Lots of microscopic coral food I guess. Check this pics out. I did a 40 gallons water change last Night.





















