Not a hydro guy but typically figure losing about 2/3 to 3/4 weight from chop to dry. If the buds are fluffy it could be that they weren't getting the right nutrients in the right amounts, or maybe even heat stress, or just could be a bunk strain. The final yield as well as the structure of the buds (airy and fluffy vs. tight and dense) is very strain dependent, and it can also take time and several grows with clones to dial things in for each individual plant.

Maybe a hydro guy can comment more on your feeding methods to see if there are any possible improvements to make. Hope this helps a little. :jointsmile: