Really overcomplicating this. Everytime you add livestock you are adding diversity. If you have added/are adding corals (or any substrate from another system... snails shell, rock, a few grains of stray sand, stony base of lps, frag plug/disk...any hard surface from another system) you have added diversity. If you haven't added corals why do you care (why do we care for a reef for that matter as long as what's there is completing the nitrogen cycle effectively). Bacteria in a bottle are completely unnecessary for biodiversity and most aren't made to be sustainable. If they are why would I need daily, weekly, monthly dosing. I should buy one 5ml shot in and let it proliferate under sustainable aquarium conditions. They do help for what they are targeted for short term (I used microbactor 7 daily and lights out for 48 hours and beat dino in both my tanks in less than a week of actively fighting it). Unless your going to dose forever that's not the long term fix. I have real live rock (from the ocean), live sand and probably added 20 frags/corals to both tanks.... Basically got active again before I got dinos. Don't think it had anything to do with diversity. One tank has been running 10 years and never had dinos until after I started adding diversity Had to do with 50% water changes and sparse feeding bottoming nitrates and phosphates out. Not enough there for the bacteria already present to outcompete dinos. Outcompeting dinos is probably more about the bacterial food source to allow bacteria to outcompete than trying to diversifying bacteria.