What are you're temps like when your lights are on? Measure the temp where the top of the plants will be. If your temps are in the 75-80F range you don't need a cooltube but if your temps are 85-95F you need a cooltube.
hudson88 Reviewed by hudson88 on . HELP ME WITH COOL TUBE!!!!!!!!!!!!!!!! I have bought hydroponic system wich have eight pot's on it.. I use 600w natrium light and i am wondering do i need the cool tube on this one and if i do, what kind of equipment i need to buy to get it work.. how does the cool tube even work i havent even seen one in working... help me plz how to install it right.. Can you tell me do i need to buy fan on it and some kind of "ductingpipe"? Peace Love and Big Crobs.. -The Gridsam- :hippy: :thumbsup: Rating: 5