I not sure where to start to give you a fair response back?????
The dwc can be an ebb and flow. You need two drain out levels. One to fully cover all roots and one with a restrictive flow out that lets the water drain down over about 30 mins. Then the restrictive drain will be the one that sets the final water level so you have air roots of one to two inches. Lower if you are in bloom. The pump will only fill up the grow tank to the upper drain Then slowly drain back for air gap. A pic would do much better than words. So if you want to see how I do it I can post a pick. It is easy with the right valve. Cheap too.
Your thinking my solution is like aquaponics is close but the microbe breakdown is fully complete before I put it in the plant tank. So no active microbe that can infect. The final microbe is one that can prevent other infections, much like making pickles to preserve food for us. I preserve the plant tea. The last microbe can be active or dead.
Azomite is not as good as mixed rock dust from more than one rock quary. Rock dust and wood ash mixed with an acid make a great mineral tea with all you need in it. This is easy to make. You can even get the rock dust from a retail decorative rock yard.
Airation is done by then water dropping into the plant grow tank and the when draining back to the nute tank it drops again. Two water falls make good air. No need for an air pump.
By looking at your pics you are by far a better grower than me. I just got my first good crop one month ago with no pests and no issues. Now I am learning about growing so one day I can be a good grower.
I will catch up with you soon with growing - this said with respect. LOL
Still my main question. Have I done something special with no pests and no water change out?????? I mean no issues at all. I just water, trim and watch the grass grow now. I do lower the nitrogen and shorten light for flower. That is it.
What do you think?
It is too bad that so many organic nute sellers have done it wrong. Is that why people don't believe me when I say I have? They think I am like the other organic solutions???? If that is the case then I have done something special.
What part of Canada are you in? I could throw a bottle of my nutes over the border so you can try it. HEHEHEHEHEHEHE
Can you can catch it?
Thanks for the input.