GMSgrowsanswered grow question a year ago Do you have lots of bubbles under your roots? They love the bublles. Add as much bubbles as you can. Do you have a fan blowing in and one out of your tent? Make sure there is a little more negative pressure than equal in and out. Throw frozen water bottle in your rez to cool the water as much as you possibly can. Your ph should be 5.8 and feed levels are perfect, your growing in water not soil. Canna nutrients are a little weak I found, so maybe an extra 50 ppm may help.