Odour Control

hi, im currentl growin 10 girls in ebb an flow, hydro system.. their just in their 3rd week of flowering, an gettin really smelly, what would you recommend to use to eliminate the odour????

U could try a carbon filter, i hear they are good'
you can make a d.i.y one by, activated carbon is readily available from aquarium suppliers.
Place a 20mm layer of foam between each 250mm layer of carbon. use wide mesh to support the bottom layer.
1m3 of exhaust air=150g activated carbon/ 20cm of filter surface/ replace carbon every three to four months or when you detect any odours. hope this helps

Carbon filter nd fan combo is the most effective, but there also things like ona-gel, and ozone generators.

carbon filter all the way, I cannot recommend this more highly. Thats if you have the cash spare though, otherwise hit up the DIY forum area, those guys are good at making cost effective hardware.

However, I'd like to stress how good carbon filters are with fans. I plug mine directly into my fan with no ducting between or sleeves or whatever. Works really well.