Yes the beauty of Hempy ... whether 1 gallon or bigger , you can totally tell dry weight.
Plants are highly aerated in these mixes.... the addition of vermiculite keeps some moisture at root level but also dries pretty quick. A simple feed / water / feed will keep things running smooth as Rez is refreshed and cleared of built up salt.
Simple drain to waste scenario. I grow for personal stash but even the lousy 1 gallon kid sand buckets give me plenty of bud and bigger plants than compared to the soil containers I run.
It’s cleaner , buds are more fragrant , simple feeding , fast growth ... what’s not to like ?
You can run a single 5 gallon ( Lowe’s bucket ) and get a fucking tree !
Some growers have implemented other grow tactics like spray rings , air stones in Rez , etc.
but it is NOT NECESSARY.
Another plus is that you can pull cut rootball out of bucket , rinse it over say a black construction pan and reuse perlite .... I reuse a lot of the used perlite and add hydrogen peroxide to water bath to CLEAN IT before re-use.
Easy Peazy
Tip : Don’t overthink nute choices .... simple 2 part mix or mega crop.
No molasses , no bud blasters , unicorn cum , hobo sweat or multi bottles .