Chemboys - pH Down MAX 0.5 Gallon beneficial microbes They can be located outside

They can be located outside the grow room and a run of ducting can be extended from them into the room to extract the air and filter it

and the washable

Optimum spectral energy required for vegetative growth

greater load capacity and higher accuracy

The Gamma Seal Lid is proudly made in the USA from BPA free

Chemboys - pH Down MAX 0.5 Gallon beneficial microbes They can be located outsideup to 8x stronger than General Hydroponics; up to 1. 5 3x stronger than Advanced Nutrients No Dyes (Why do others add dyes?) Promotes plant growth and overall healthy plants Promotes pH stability THIS STUFF IS STRONG. BE VERY CAREFUL WEAR SAFETY EQUIPMENT. DO NOT MIX WITH pH UP AND YOU MUST ALWAYS DILUTE BY ADDING SMALL AMOUNTS TO WATER SLOWLY AND SAFELY, BEFORE USING.