Prizm skimmer, 5lbs LR, 2+"LS, Temp 78°, Phosphates <0.1, Ammonia 0, Nitrite 0, Nitrate 0, PH 8.3, Alk 2.2, Calcium 400 Specific Gravity 1.024, Doising Kalk + Liquid Calcium, Oxgen 6, Water changes one gal once a week. Add Kent Essential Elements at water change.
Did a two gal water change when...