Alkalinity Burn or something else?

[christyf5]

Hmm, I don't know what else to think of. Funny thing about tip burn, either it will correct itself or it won't. If you really want to baby them, I'd try your lights at an hour on, hour off schedule for a week or two (then do 2hrs on 1hr off and keep stretching it like that) just to see if that is the case. You might see things turn around.

[Lance]

If the burnt tips begin to collect algae, i find it best to cut off the tips and hopefully they will re-grow for you.