I use 6 of the buckets, have an airstone in the res(very small) but i have a massive pump (20 watts) pumping 6 airsdtones in each indiviudal bucket. I also have the nutes recirculating 24/7. is this too mcuh Dissolved O2?
Your water can only retain so much do, worst thing you're doing is pumping unnecessary hot air into your nutes unless your pump and it's ambient air are cool as well.
disposition answered you! NO to many bubbles is not a bad thing UNLESS those bubbles are bringing heat from your air pump into your nutes. causing your rez temps to rise!
You can never have enough bubbles I use 3 air stones in my 5 gallon coolers, Its over kill I know. One trick I do is buy a small desk fan and put it blowing right behing my air pumps so they are sucking and transferring cool air into the res.