yaksplat
Aquarium Advice Freak
I've been trying to raise my Ca unsuccessfully. I'm using Kent Tech CB A & B. I have my alk just where i want it, but the Ca will not go up above 400 according to the red sea test kit. I'm about to try what the kent site recommends:
Jim
Calcium testing in marine systems is fraught with difficulties. Test kits generally don not work well in the ranges that we run in reefs and many ions in marine water interfere with the kit. If your calcium level does not make sense, try diluting the aquarium water sample 50/50 with distilled, deionized or R/O water and testing. Multiply the result by 2. This will both save on valuable reagents in your kit and generally give a more accurate reading. (You may want to consult with the kit manufacturer to determine that doing this will give valid results with your brand of kit).
Jim