hello, I'm a beginner in this field, I have 1 tank containing 2 corals and 2 clownfish and angel fish, my first question: I still have 1 ampoule of starter bacteria "biodigest and bioptim" is it safe? if i put it in my tank which contains 2 clownfish and angel fish? and the second question, does the use of filters in tanks have a schedule like lights? thank you very much