23rd May - Start week 11. (Week 5 Flower). Water change. Also added 40 ml Hydrogen peroxide 37 g/l , 40 ml Microbial additive to initially sterilise tank load. Delayed stretch from one of the 4 plants, now nearly 140 cm high. Hopefully should be reaching end of stretch - running out of headroom for the light. Buds starting to fatten. Trichomes forming on Sugar leaves near top buds across canopy.
Light average distance from plants ; 20 cm approx. closest : 5 cm.