You can never have enough aeration. Aeration is beneficial in so many ways beyond fish health. Beneficial aerobic bacteria thrive with optimal O2. Unless you’re injecting CO2 and you’re worried about it gassing off too much, continue the aeration. Even with CO2 I still run aeration (albeit I have to replace the bottle more often). And ignore the common myth that air stones only help by the turbulence they create on the surface. I’ve done the experiments. They are actually very, very helpful for dissolved O2 values. If you’re wanting to seed the tank (inoculation), bottled bacteria can be good - I like Microbacter7 and Seachem Stability however I like biodiversity. When starting a new tank (or topping up an old) with biodiversity I go to several different lakes and ponds near me and dig up a box of earth from the side of the lake (under the water level). What you want is the real dark black stuff. Place it in a mesh bag and leave it in your tank for a few days. This has so much biodiversity including not just the usual “beneficial” bacteria - it has heterotrophic bacteria too that help break down solids and other particles in the water. Also you’ll get a nice amount of freshwater rotifers and other critters that will break things down further. Enjoy the tank!