Well when I say one inch from the brim of the bucket that is well over the bottom of the nettle pot or what ever they call it.
If you're using 5 gallon buckets 4 gallons on nutes is plenty.
Well if you hang around here long enough you will find out in like the over reactive first time mother(this is my first grow) and I also try to be preventative. So I've been reading about all the scares with mold and my plants are very thick and bushy, so I tried to drop humidity as a preventative to avoid mold. I had what i initially thought was mold growing on my stalk was what initially started the mold scare. Is having it that low maybe driving the leaves to absorb more water to fight the humidity? Resulting in the difference of what looked like the "over watering" symptoms of soil?
I have a chiller waiting to be installed. Ran into some issues with leaks. Being my first grow and with assuming I will have setbacks to overcome with implementing it, I figured I'd just wait for the next round to implement the chiller.
Hmmmm that could be a very likely scenario......~68° F is the sweet spot for res temps, if the res is too hot it will limit how much oxygen can be dissolved. Adding the second airstone must be adding more heat to an already warm res.
$0.02
Where were you when I dropped over 200 on a chiller? LolMicro organisms will thrive in warmer temps, using something to control them is good but getting those temps down will solve the dissolved oxygen issue.
There is a neat way to setup a chiller. Peltier plate, heat sink with a fan, an aluminum cooling block and some thermal paste. Get a pump and recirculate that bitch. I think you could build one for less than fifty bucks if you can source the parts inexpensively.