i have a 30in h x 18in w x 24in d hydro cab with the light and the reservoir i only have 19in od grow height. i acquired some lowryde r#2 from a buddy. i had to move the lr's to my tent because come chop time they where 26in tall.
i posted that backwards sorry. i use technaflora nutes with great results. if the ph of my rest is going up i add ph'd water and nutes. if the ph is going down i add ph'd water only.
hey MI grower i have a 2x4x5 tent with a 400w cool tube 425cfm fan with fan speed controller. runs about 5 to 10 degrees higher than th room it is in. but it will run cooler if you can run the exhaust out of the room.