My tank is now 8 weeks old and ammonia, nitrites, and nitrates are at 0. As of today, alkalinity is 8.3 and PH is 7.8. I added two clown fish two weeks ago and a purple tang, devils hand, and a few snails and hermits a week ago, which are all doing great. My question is: I am using the BRS 2 part dosing for the first time and wondering how many ml I should start out at?