Hi Can anyone help me find out what might be the cause they are 3 weeks and a bit old in bio bizz all mix under 250w dual hps. Someone suggested mg so I gave a real small amount and foliar feed still no good. My ph should be fine and I'm now giving distiller water no mutes after a burn then flush last week. Could this be recovery from the burn & flush? I had a mark like this the size of my little finger nail when one plant was a week and a bit old. I suspect it might be the bio bizz all mix? My temps in tent 75-80 rh 50% I'm stressed about this
Dont assume your pH is fine. Make it a habit to check your pH at first sign of any problems. After that looks like P def.
