Potasium defeciancy/nute burn perhaps? Using Bio Bizz

[magnum gom]

600 w MH with cooled reflector hood
Light cycle 20/4
Light distance 60 cm from tops
Temp highs of 29, Lows 25
RH 50 - 67
Soil Gold Label special light mix
Bio Bizz nutes - grow, bio heaven, root juice
Plants are 22 and 26 days old
Strain Magnum Gom auto from Zoes Seeds
Ph between 5.9 and 6.8

Cant quiet tell what this is any one have an idea.

 

[Heavily Medicated]

What temps are you running. I suspect that this is a light/heat related issue.

 

[magnum gom]

Temps between 25 and 30. Cant get it any better than that unfortunatley.
600w MH sitting at 60cm from the tops.
Last feed was a week ago Bio bizz 0.5ml grow, 0,5 ml top max and 1ml Bio heaven per litre water (around 1/4th recommended nutes)
Half a week a go gave them there weekly dose of Silica. (great for the heat amongst other things)

 

[magnum gom]

@Waira hey I hope you don't mind the tag bro I notice your pretty busy round the place here
What are your thoughts on this little problem of mine?

Also I noticed you saying to a lot of people about getting a perfect 8 ph tester or something like that? You got a good thread I can school myself with about this tool?

 

[trizen]

Good luck

 

[Waira]

...kinda weird looking symptoms MG,... they way the margin "teeth" are drying out looks mostly like K defc., and with you feeding already very mild nutes at 1.4 str., that makes sense,... no other off-pH symptoms so far, so feed her more, 3/4 str. dose first round,...

.. it's the Accurate 8 soil pH probe, by Control Wizard,... no thread, it's use is very simple,.. this tool will give you in-pot pH reading, no lousy run-off testing! It works on the same principles as those cheapo skinny probes you see around, but the A8 is more robustly built and better calibrated,... Keep the tip clean and scrub before each use after it's been sitting, using the pad they provide; wipe clean with a damp towel between readings pot to pot,... best results come from testing when soil is well moistened, not freshly watered/fertilized, or any kind of dry,.. follow directions on the pack too,...