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Can you post some pics?

You have some signs of new white roots trying to get started, but you also have a lot of brown crud on most of them. Perfectly healthy roots look pure white. The browner they are the worse off they are. Most of it doesnt look super dark, but there are some areas I can see in the first two pics...

See - I was right! Fuzzy hairs make you a happy grower ;) HPA and AA are both more complicated than other types of hydro, and yes, HPA can be dangerous if you dont take care. Exploding 5 gallon steel tanks filled with water or air under pressure can ruin your day for sure! AA is not quite as...

Did you pull a plant out of the hydroton to check or just peak or? What do they look like? Can you get a pic or two or three? Also - whats your current flood timing again? Everything in those pics you posted looks close enough to me - except the last one of the sad plant. It pretty much has to...

As long as its not too strong, you will be fine. You can run chlorine at concentrations as hi as 5 PPM and its still safe for plants and humans. Here is an old post about calculating concentrations based on using pool shock - which is just a concentrated form of the same chlorine in household...

If you can, try to sterilize the effected parts as well as possible when you re-fill. Like I said, it might be time to start running a sterile rez.

I doubt RO water will help. Someone above suggested dropping the C02. What is your light level watts per sq ft? Might not hurt to lower it down until they recover. Is there any sign of new root growth? It might be worth taking a look at those roots - un-pot one of the sick ones. They may just...

Unmixed nutes would not be slimy, plus they wouldnt wait a few days to show up.

I doubt a humidity sensor will work. The humidity in a sealed root chamber like yours will always be very very close to 100%. With all those micro droplets evaporating all the time it cant be any other way. It will drop when your recirculating pump kicks on and brings in fresh air, but quickly...

My HPA setup was quite different from yours - but remember I was and am still after fuzzy hairs. I was wanting to go into the theory before I got into hardware, but I will give you a quick rundown. Much of the hardware and setup is the same with the AA setup. My timers are cheap digitals with...

Why aeroponics? Most people would agree that aero is the apex of hydroponics. Ok, maybe its more like some people would agree ;) It is supposed to give you faster growth, faster harvests, bigger buds, higher yields, etc etc etc. Ok, fine. All of that is true – in theory. In my experience, YMMV...

Here is a quote from an old post with all the math you need. You will need to change the 49% to 65% because your shock is stronger. I dont know anything about UCroots, so no clue how to adjust for that, but its generally accepted that 1 to 5 PPM of chlorine is safe.. Note: I have some calcium...

There are several different ways to do flood tables, but in all of them you need to keep light away from the roots. Those are sad roots with lots of algae on them. What is your flood/drain timing? For best results, and maximum aeration, you need to flood for the shortest time you can, then...

Thats bacteria of some type. Are either of those nutes have organic components - derived form any kind of plant or animal - like seaweed or worm castings, enzymes, etc? Organically based nutes in hydro are a bad idea. Bacteria just love that crap. Next thing is light. Most bacteria need...

It can vary a lot more than that - on the low side. Pretty much any type of aero will allow you to run lower EC values even if you dont have fuzzy roots. Its a matter of 'air'ation at the root level mostly. For example, I have probably the highest possible aeration of any hydro as far as the...

My tap water is 0.2EC or a bit less - well water. However, the main reason I can run that low is Im doing air atomized aero. This type of hydro is more efficient as far as the plant uptake of the nutes. Also thanks to the AA aero, and the way I do it, I have fuzzzy roots. Fuzzy roots are a...

will do - later tonight if I can get some chores done and dont get tooo stoned....;) Hold those questions for when I start the thread. They are good questions and it will be good to have them in that thread for others to see. Hi buddy! Im only running autos these days. Have two Sebrings...

From my reading, the "best" humidity to run at is based on Vapor Pressure Deficit - VPD. Here is a chart. You can find more with a Google search. I, not going to go into the theory, but its basically keeping the leaves happy as far as loosing moisture too fast or too slow. Note that the ideal...

Im going to be starting a general HPA/AA thread in the next day or two in the main forum if you are interested. However, before you start I think its important to note that HPA and AA are not for everyone. It takes a fair amount of testing and fiddling around and trial and error to get an...

Ive posted a bunch of root pics in the root porn thread, but I havent posted any details on my current setup on here. I plan to start a general advanced aero thread soon - to include HPA and AA, but focused mainly on AA. I'll include all the details on my setup there if you can wait a day or...