I currently grow organic hydroponics with a brand called Sugar Peak. It has increased amounts of sugar for plants that uptake a lot of natural sugars in nature. It is sold locally through my hydroponic store and is 100% organic. It is a bit expensive at $30 / gal The guy at the store told us that by using this nutrients instead of something like earth juice, the clean up during a nutrient change is way less of a hassle. There is no major build up on the sides of the nute tanks and no rotten smell unless you push it all the way to the two week mark, and even then its not that bad. Whoever said that it smells like a sewage treatment plant must be using some very strange nutrients. The guy at the store also said that because its organic, small brown merky stuff will collect at the bottom of the tanks but that is normal because it is organisms living within the tank and is very healthy for the solution and the plants. This is our second grow with this stuff and we may even use it again if this grow turns out fantastic like we think it will. Organic is the only way to go!