Leaf tip burn?

[jaspertodd]

Hi.Never posted here before.
Well iam in my 4th week of flowering.All the way up to this point have had
no problems till now.I just changed my res friday and when i looked in on them Sat i noticed my plant has Leaf Tip Burn and a few of the lower branches the leaves are drooping?Is this normal in the later part of flowering?
Cause the rest of it looks awsome and green and perky.Iam using GH Nutreints
in a 10 gallon rubbermaid with 5 gallons of distled water since the start.Iam sticking with there feeding chart to a T.I use a 400 watt HPS for flowering and MH for growth.Inside the res i have 2 airstones,a pump that top feeds.
3 fans,temp 75,water temp 75,humidty 50% inside a growtent.No insects
So is this normal?Thanks for the help.

 

[jammie]

what's yer ec? if ya think it may be burn, dilute your resevoir and recheck your ph

 

[PetFlora]

If you can easily drop the rez temp to ~60 that will be good.

Tip burn is 99.9% hot nutes. It's a good technique to get there then back down. Each plant has it's own max nute requirements

hth

 

[jammie]

If you can easily drop the rez temp to ~60 that will be good.

Tip burn is 99.9% hot nutes. It's a good technique to get there then back down. Each plant has it's own max nute requirements

hth

WTF???????????????????? please don't do this. res temps much below 65 will stress the roots and slow growth significantly

 

[jaspertodd]

Ok after looking at some others pictures of there plants and reading more
i guess this is just a normal .I have seen pics of some plants of the same
breed doing the same thing in flowering.I been keeping a close eye on everything
just in case.Thank you for all the replies.

 

[bluedream420]

whats a good PH for a plant to be at?