so gentleman....these are my thoughts on aeration......NOT NEEDED
If you are running F&D you should be watering 3x a day for 15 min at a time
if you are on a drip system
when you water....the feed is being mixed with oxygen as it drains from the tube
I wouldnt aerate your res because the pump alone raises the res temp
I have a $12.00 pump I turn on when I am mixing my res and when I am draining my res
I spoke to Matt the scientist from
botanicare about this and the above is what he told me
DWC is a different animal because it is counting on you maintaing a set amount of nutrient solution in the system which dosnt allow for oxygen to the roots which will choke out your roots
but there are systems like the "Kratky" method by which you sit your plants atop the nutrient solution....as the res drops it creates a space for your roots to intake O2
rendering diffusion usless....
my suggestion
save you electricity/stones/air pump...etc....for the DWC
leave the res how it is.....if it becomes stagnet you have let it go to long without changing it
if you are in drip/DTW and the res dont look good
drain and clean well with bleach
then either add bleach or H2O2 to the new fresh res
those are my thoughts....I know it goes against "Hearsay" but I will never steer you wrong
it will create more problems than not in your feed tank