Brown tips from bottom up

[Upstate]

Out of my area of expertise but leaves that fall off when they’re otherwise pretty healthy is usually sign of over-fertilization or over-watering. Of course in this case it can’t be the second option so my guess is the first one. I have lots of calcium in my water and it always causes me issues if I use it for too long without Flushing. Salts from the calcium buildup in the root Zone and cause a lockout. Been a long time since I’ve grown soiless. @ReikoX has a recipe for homemade Cal Mag using eggshells and vinegar I think. Also for PH down you can use citric acid which can be purchased at a health food store much cheaper than any other way to do it