Been daily monitoring my big 3, and notice some discrepancies recently. The last week my calcium started at about 465ppm, mag at around 1350-1400ppm and alkalinity at around 3.5 meq/L. I realized my alk was low for the calc and mag levels so I dosed some bright well alkalin buffer to raise it to about 4.2 meq/L over two days. The night before last I tested my magnesium, it showed at 1200, a 200ppm drop from the previous night. Calcium was at 440ppm, and alkalinity was 4.2. Naturally I dosed the recommended amount to raise it 100ppm, and tested an hour after drip dosing it at 1295ppm. Today, my calcium is at 430ppm (usually only lose 5ppm/day) and mag is back down to 1200, while alkalinity dropped to 3.5. Through all of this pH has stayed stable at 8.3. I decided to check my salt (hydrometer, checked multiple times a year against a refractometer, I trust it to be accurate) and it came back as 1.0225. Will this lower salt be causing the weirdness in my big 3? Tank is a 34g solana, over 40 different sps pieces (wild cut, maricultured, and aquacultured) and a couple acans and gorgonians. Everything looks great, growth has been amazing, pe is awesome, even on fresh cut wild colony frags. I just don't understand it. I do dose daily 1.5mL of acropower and usually a few drops of boron solution, to maintain boron at about 7ppm. I will be dosing balling method on my 3 part dosing pump once I get my daily uptake values figured out.