Hi,
Hope you find the following helpful. I've grown a lot of weed mostly many years ago. My state is now legal so I got back into this - just because it's fun and I wanted to share the fun. Years ago, I grew in soil and hydro. Now only hydro for weed. Due to legal - I chose to grow auto's. We can have 8 plants total but only 4 in flower.
My grow style can be described to resemble a Dutch bucket concept where I grow 100% course / extra course pearlite. The containers are 3 gallon buckets with a discharge about 2 inches from the bottom. You simply run the feed supply for several minutes (I run 7) every 30 min or every hour depending on stage (seedlings every 30 minutes). It's impossible to over water. The run off goes back to the tank.
In my first tent you can see wooden benches to hold the plants where the Dutch bucket run off is collected by a 2 inch pipe emptying into a 17 gallon tote outside the tent. Rate of growth is amazing. The problem with that first tent was headroom. All the research I did - Autoflowers were supposed to get to a certain size. My plants grew 15-20 inches bigger than estimates. It's messy - no style points, just very functional. 4
Spider farmer 2x2 lights. 100W per light.
Second grow tent - same concept except plants are placed on large low profile storage containers connected via bulk head connectors making a large tank. Buckets drain directly into the storage containers. No no more headroom issues. 2
Mars Hydro 2x4 lights I think 300W per light
Both tents are 4x4x80.
The nutes are a 3 part from General Hydro Flora series where I also use Armor SI and CaliMag (totaling 5 parts). Use the instructions for medium feed. I make 10-15 gallons at a time and often add 1 extra gallon of water. I use a multi meter type tool for EC, PPM, and PH. The tool was like $30.
Two images are posted - one of the first tent (see how big the plants are for such a young age).
Next image is the newer tent using the storage containers as the tank.
I know you guys will crap all over the following statement. The harvests can be enormous. The image is a 3 gallon bucket from 1 auto flower Bruce Banner 3. Later I pulled nearly another 2 gallons from the same plant.
Generally, if you keep the feed tank full of good nutes with correct PPM and PH, and manage the temp and humidity, you will have a great harvest. Also make sure to use good lights.