[houbanna]

What size tank? How far is the light unit from ur lowest plants? Also is the ultra bright 6500k one of the satellites settings or extra light fixture? It may not be the light period but the intensity. What fertz are u using and dosing, could be to much

 

[houbanna]

If the sat + is the only light source Ide suspect high nutrient problem and like the trigger advised, dose some excell (liquid co2) basicly. To help plants suck up extra nutrients. Keep us posted