Funny that, I brought home water from the beach today and it tested out with the test i have perfectly. Everything was right, SG refractometer 35, PH 8.12, nitrates 0, ca++ 420, po4 0, MG was low not sure my test is working or good. I am going to collect some again and mail it into one of those labs for a more accurate test on everything and post my findings. But, I am a long way off from changing my tank water with it.
