I must have brought some fungus knats in with the two plants in the 3x3. I dusted the soil and floor of the tent with DE and put sticky pads in the tent. If I see any more knats I'll take further action. The 3 plants in the 4x4 are ok I think. All of the plants got DE dusted, no top water, just 6.0ph water with silica in the water bases.