Hydro is shorthand for hydroponics, which is a method of growing plants. It has nothing to do with the potency or species of the plant. I have never heard of sess and if it is brown i am not looking forward to running into any. Hydro is usually much stickier than weed grown in soil.

From what i have observed, people who smoke shittier weed from time to time appear more stoned than those who smoke good weed every day because of the tolerance you develop.