The ultrasonic process involved to create the fog also creates heat as these disks are basicly vibrating at a high freq causing the fog. Reguardless of what the disks are coated in there is nutrient filled water evaporating on the disks eventually leading to clogging.
If there were a disk that didnt clog your still faced with the problem of equal delevery of fog through lots of roots. A big multi head fogger will also be heat added to the water supply requiring a recycling timer to the mix.
Net pots in a sealed plastic tote with an airstone/airpump left on all the time will cost you less money for better results. I have seen complete grows done that way.
A fogger system no matter well how its built or designed is going to require the same if not more money to set up. Your going to need the fogger, a recycle timer, and in some set ups a water pump to feed the fogger and so on. Drop the $30 to $200+ you pay for the fogger and get a bigger water pump, tubeing, gromets and sprayers and in my opinion your better off. Your going to be buying pretty much the same stuff for a fogger build as you would in an areo build like EARLS. With the exception of the fogger of course. Its just an added thing to waste money on and wont benifit an already working system and has yet to prove its self if ever for complete growth.
I have also looked for a finished fogger grow to no avail and have seen countless finished grows done with aero, bubble, NTF, drip, and ebb and flow systems.
Sure useing such a system to root clones I hear of success. I however have had much success rooting cuttings in a net pot and neoprene insert in the very same system I will be flowering it in so why spend the money
If your thinking you know better and fog will work for weed I welcome anyone to put up or shut up by posting photos of killer buds growing with just a fogger or go blow your bank account trying if that makes you happy.