That damage isn't going to heal just because you changed the water. Look at new growth to tell if there's an improvement.

What do your roots look like? Are they bright white or going brown?

pH should not be a problem- the poster is in hydro- 5.7 is fine.

I see a water uptake problem... get a pic of those roots!
stinkyattic Reviewed by stinkyattic on . brown spots?!?!?! need help asap not too sure whats going on with my plant... shes a month old, started from seed, growin in a bubbler system, ph 5.7, temp 82, under 5-26watt cfl's 6500k..... ok soo shes haveing some problems... a few leaves are twistin, some have brown spots, some at the edges and others all over the leave.... so in tryin to fix this problom, ive made sure to keep a constant ph @ 5.7(something that used to vary from 5.5-6.5) and more brown spots appear... changed the water, mixed in nutrients (ecogrow Rating: 5