I do have air stones in the res. Do you not use them? My average res temp is 72. Is that too high?
that is up to you.
i run no air pumps. air pumps cause wild pH and EC. hella fluctuation. it can also inject airborne spores and pathogens into the res no bueno
i use mechanical force and waterfall with fast flowing water to create my DO.
i try to keep my res @ 65F or less.
Dissolved Oxygen is relative to temps. So it doesnt matter if you have a 2hp air pump on your res....or if you pouring 30mL of 50% h2o2 in your res.....it wont matter. You know why? your res temps are @ 72F. The warmer water gets, the quicker it saturates. So at 72F res temperature you can only get maximum 8 mg/L aka ppm or LESS into 72F water.
colder water can dissolve the gas (o2) more.
If the water becomes too warm, even if 100% saturated, O2 levels may be suboptimal for many species of life
In other words, oxygen can be present in the water, but at too low a concentration to sustain life
After that comes anaerobic bacteria (the bad stuff) when you have warm water, it creates a nice breeding ground. Anaerboic bacteria (the bad stuff) doesnt like air much. nor cold temps. Pythium aka Root Rot begins to thrive and bam....
then this is when people will start using h2o2.... which will kill them. but not all by itself. it is only a bandaid.
this is why i always said, roots like cold water and high DO levels, not warm water and h2o2
anything over 68F in hydro is subpar in my not so humble opinion. as the reason we do hydro is for the increase water supplements and bucoo crazy roots to take advantage, we must control it.
then we wont need pathogen control
i dont even use it. dont rinse my res out between res changes. none of that extra shit. i have one of the cleanest running res i've ever saw