Aerobic bacteria will be present if the O2 levels are at least 2 mg/l at the bottom. Otherwise you will have a falcutative habitat with a mix of anarobic and aerobic bacteria.
To ensure you have the right strains of bacteria, I would sugges enoculating with a bacteria prodcut.
You will find that bacteria comes in two forms, powder form (the bactria builds a spore and is for lack of better terms, in hibernation).
After installing an aeration system at Sea World of Florida we enoculated with a bacteria from a company called SePro. They are a manufacture of aquatic herbicides as well as their own bactria line. You can get the right amount and type by contacting them at
www.Sepro.com.
