white tips

So I've had a few set backs but now everything is going great I woke this morning to find white tips on the leaves of 2 plants ones with most buds forming ironically I have been trying to drop the ph with a flush for 2 days no luck can't get it down past 6.7 running stand alone tank with premix...

Hi all, this plant is on day 14 and looked to be going strong up until this point however with the white tips as below I am n9te sure why this is happening with my setup. Strain- sweet Valley kush Age- currently 14 days Light- Marshydro TS1000W hung at manufacturers recommendations at 24...

Mega crop white tips on cheese

Hello all! I want to start a disscustion about white tips. There are several answers to why the tip of the leafs get white/yellow. Some says it is nutrient burn, some says it's lack of NPK+Mg. And now I really want to hear your oppinion. Sometimes this white tips appears together...