I'm doing a gelato for the first time. She's about 4 weeks in.
While I've been doing this for a years, I'm still a newbie.
I prefer dirt. It's more forgiving. It won't grow as big or as fast but it's safer.
Not actually dirt, I really like Sungro #4. It is incredibly fast draining while it also maintains moisture. The plants love it.
I start with rapid Rooter plugs. It is very important to transplant as soon as you can simply so the plant never thinks it's root bound.
I always use fabric bags. I never take anything apart to transplant. I simply dig a hole and drop the bag into the next level up.
The fabric bag must be supported with some type of sturdy object. I put them in a bin. That's because it's very easy for the media to deform when you move the fabric bag by the handles, which in turn damages the root structure.
You have to put at least an inch of some type of material to drain on the bottom. You could use lava balls or plastic filtration balls or pretty much anything that gives an area where the water can drain through, but the roots can also hook on to.
When you water saturate everything and extra will all flow out to the bin. Then the bin will act as a reservoir and you can watch the plant suck that water in and then you pay attention to water a little later.
I have a filter attached to my hose which I put through a hole in the window in my house. That way a can fill 5 gallon buckets right inside my grow space and I boil a gallon of water per every four to warm it up. I never hit my plants with cold water.
I water with straight water or a touch of nutrients without pH adjusting, but anything past that I ph adjust. I have destroyed several ph Meters.
Follow the calibration instructions very carefully and make sure you have a bottle of distilled water around to clean it and the solution to keep the sensor moist when you store it.
When you create the pH calibration solutions, keep all the extra in small sealed jars or bottles or whatever. That way you won't blow through the calibration solution envelopes and you'll be comfortable recalibrating your pH meter on the fly.