PARAMETERS (important) Temperature: 80 degrees PH: 7.4 Ammonia: 0 ppm Nitrite: 0 ppm Nitrate: 0 ppm Salinity: 33 ppt dKH/KH/Alkalinity: 12 dKH Magnesium: 1360 Calcium: 460 ppm Phosphate: 0 ppm Test kits you own: API - Salifert Magnesium Liquid or Strips: Liquid Brand Name: API Are they Expired?: NO Tank size? 55g Estimated total system? 70g Reef, fish only or, freshwater? Reef Current inhabitants? What and how many? 1 Yellow Tang, 1 Diamond Goby, 1 Firefish Clean up crew? 15 Blue leg hermits, 5 Nassarius Snails, 2 Trochus Snails How long has your tank been set-up? 2 years Substrate. Type? Aragonite sand Depth? 2" Live rock? Yes How much? #70 Did you recently add some? No Filtration. Type? Live Rock Protein skimmer? EuroReef RS80 Do you wet or dry skim? fairly dry Maintenance schedule for filtration? Stir sand while doing water changes Drilled tank/hang on back overflow? Drilled Tank Sump/refugium. What's in it and how much? 30g sump Macro? What kind? Yes Cheato Lighting. Lighting type? T5 Age of bulbs? 2 months Feeding What? Ocean Nutrition flake/ pellets, mysis, cut up shrimp, nori How much? just enough to keep everyone alive How often everyday? Water change schedule. How much? 10g How often? weekly What salt brand? I/O RC Water source? RO/DI Additives/supplements used? Kent dKH buffer, Coralife calcium, Ion Mag Do you have a ground probe? No What kind of flow does your tank have? Mag12 return pump thru 3 loc-line returns, 1 Koralia 3, 1 Koralia 2, 1 180gph powerhead There are the params for my entire tank as of today. I am trying to figure out why my coraline algae is dying off. It is all turning white. Does anyone see anything that is amiss other than the low pH, and the alk being a touch high? Is it possible that one of the tests didnt come out right?