Help needed new grower.

[Schedule]

GG and Runtz autos have started to show some kind of leaf damage. Week 5 from germination.

Soil, Biobizz light mix

Nutes, Biobizz grow 2ml, bloom 1ml, top max 1ml,

Tap water, left to stand 24 hours

RH 65%
Temp 22.5c

Thanks

 

[Schedule]

PH is 6.4
Run off is 6.4

I followed Biobizz instructions to feed every water.

 

[elcoloan]

While the experts come... how do you measure pH? what do you use for this?
Also, shouldn't you use a bit lower pH... like 6.1 to 6.3?

 

[Ryno_nuggs]

Howdy when I was running biobizz light mix I was told to feed, water, water, repeat. It is quite possible you over did it and have nutrient lock out.

 

[Schedule]

While the experts come... how do you measure pH? what do you use for this?
Also, shouldn't you use a bit lower pH... like 6.1 to 6.3?

I used a accuread digital PH pen, it is calibrated to PH7 and was still spot on when I checked it with buffer this morning.

 

[Schedule]

Howdy when I was running biobizz light mix I was told to feed, water, water, repeat. It is quite possible you over did it and have nutrient lock out.

Yes possibly maybe I will just water water half feed for a few weeks, to see if it helps.
I gave them both calmag this morning as my water is quite soft.

 

[automan2]

I too am a BBLM user for years...Bio Bizz Light Mix likes 6.4-6.5 ph....you didn't mention how much water with the nute mix but I'd suggest a bit of over-nute problem but prob not lockout. Pushing a rope usually causes kinks.
Personally, I only feed after 3 weeks veg, and then very light on nutes. My mix is usually 1/2 ml each of grow and bloom, gradually increasing to 1 ml each in 1 ltr water that is ph-ed after nute mix. Cal mag as needed.