Ramp up/downs are why it's best to use multiple bottles with staggered start/change times. For example 2 reactor bottles changing out one per week.
Ideally you want the same bubble rate all the time. What you DO NOT want is 2 bps for a few days, then 3, then 4...then back down to 2 again for a week, etc. It will be an algae nightmare, specifically bba.
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