Wanting to add Aragonite to my tank. This is to improve buffering capability and increase surface area for nitrifying bacteria. Existing substrate is CaribSea Eco Complete African Cichlid sand. Want to add 10 lbs Arogonite into 60 lbs sand. Have read a number of "do's and don't s" about this. Certainly don't want to harm my water babies. Any thoughts or suggestions on how to do it safely?