Ebb & Flo question - slight problem

[burns1n209]

Whats with going through 50 old threads and just putting nice, thats not a legit way to up your post count.

 

[C@nn@M@n]

It was actually 25.

 

[gh0stm0de]

I found his insight to be quite stimulating.

there's a life lesson here, somewhere, about minding one's business

 

[Purple turtle]

Plant leaves are folding slightly upwards and I'm seeing something that looks like burnt leaves. Clones are planted in rockwool and tray is filled with Hydroton. I water 5 min every 3 hours. Takes 2 min to fill. No water during 6 hours of dark. Ec is about 1. Ph is adjusted every day to about ph 6. It rises something like 0,5 every day. They where very slow in the start and they have been vegged for about 3 weeks. Res have not been changed yet. I feel that I have used large amount of ph down. It's in powder form from GH. Temps about 75f day and 60-65 night

Finaly, what can the problem be?

It doesn't sound like burnt tips imo , you are only feeding at ec of 1 so 500ppm.

do you top your rez daily with water ,could be they are hungry and want some food,with daily floods,your plants eating each time and water add backs the ph will rise as your ec drops,or the ec is fine but the plants cant access the food with a starting ph of 6 and it rising from there onward up,i generally ph mine down to 5.5 even(safe as low as 5.2 and as as high as 6 i let it rise)..

hoping you sort things out

pt