** same here ... I enjoyed that original post, although I didn't agree with all of it, (like the meters, for example, and I'd put an airstone in every container, they're very cheap)

Sorry man, probably didn't explain to well, kinda bent when i wrote that. I do use one airstone per pot. I mount each airstone to hang under each pot. The point i was trying to make was you NEED good airation

Reason I never worried with TDS was cause with a TDS it will tell you the total disolved salts. A plant enjoys some chems at a different rate than others. Topping up with nutes could therefore cause an unbalanced solution I prefer just to change regually. Has always worked for me. Otherwise with a 12litre res I would be going crazy trying to keep it constant. Any other hydro sys, of course. This post was ONLY to do with DWC, do not try this with an nft or ebb n flow etc!!!

I use a CO2 controller with 1000ppm dosing. It shuts off int and ext. fans for 15 mins whilst going through a 10min dosing cyc 8 times during day. If temps rise above 30 fans come back on immediataly. During night ex. and int. fans are shut off (gets blo0dy cold here) to conserve temp and dose is held at 1200

Lighting, I use a 400w hps horticulture light in flower and through veg I use a 250w mh

Occasionally I screw up and flower too late and they get too big, then I gotta get both lights going to cover the area.

Thing I like about my sys is low maintinance, I work 12hour days six days a week. Growing is just one hobby outa many and my free time for measuring etc. is nil