[fishytime]

Calcium, magnesium and carbonate hardness need to be thought of as a perfect triangle...... the big three.....if one one these sides of the triangle are out of whack it makes maintaining/altering your other parameters very difficult...... you need to achieve a balance......once things are in balance, maintaining/ altering the parameters.....is easy.....as mentioned, there are many reef additive calculators out there that will help you determine how much of the product you use, you will need to use......... now that you are into a larger tank you will likely find that using off the shelf additives will no longer be economical......look into buying your additives in bulk.........Im not sure what dosing pump your running and what features it has, but if you can, try doing the math and setting the pumps to dose several times a day......"one shot" doses are ok if you have to do it that way, but dosing several times a day will limit the large spike, gradual decline effect that "one shot" dosing has.....this is what I love about the profilux dosers......I can dose small amounts 24 times a day and my parameters or rock solid......something that really has a positive effect on the finickier corals.....