Indoor Burnt tips on new growth - light burn or Nute burn?

[Sleeper143]

Hello, me, again!

Some of my new growth on my Critical Express has whitening/yellowish tips (26 days old). I had lowered my lights about 24hrs before I noticed so thought maybe light burn, but it could be Nute burn - what do you think?
She’s getting 0.5ml cal mag, 0.5ml silicone, 1ml alg a mic, 3ml fish mix, 1ml top mix and .5ml heaven (all per litre, biobizz, in biobizz light mix, 11L fabric pots. Under a 600w MEIZHI reflector LED 277w from wall)

 

[Shrederr]

Dont care how much u feed in Mililitres. Care for your EC.

I like simple feedings.
2-3 bottles no more than 0.8ec for veg and up to 1.2 for peak flower

And it does looks like nute burn. Dont flush. Back off with half the ec for next 2 waterings. Should correct itself.

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[Sleeper143]

Dont care how much u feed in Mililitres. Care for your EC.

I like simple feedings.
2-3 bottles no more than 0.8ec for veg and up to 1.2 for peak flower

And it does looks like nute burn. Dont flush. Back off with half the ec for next 2 waterings. Should correct itself.

Sent from my Redmi Note 7 using Tapatalk

Thanks, dumb noob question- what’s ec?

 

[Shrederr]

Thanks, dumb noob question- what’s ec?

Ec stands for Electric Conductivity and is a measurment unit for level of nutrients in the solution.
EC level is measured in milisiemens (ms) or microsiemens (us)
So, our EC could be 1.0ms or 1000us. / 0.8ms or 800 us. Although its common to just use 1.0 EC or 1.2 EC.

Not a pro grower, hope I got this explanation 100% right

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[AutoWonders]

Not sure that I see nute burn versus new growth. Put your finger behind one of the tips to see if it still looks yellow.

 

[Shrederr]

Not sure that I see nute burn versus new growth. Put your finger behind one of the tips to see if it still looks yellow.

Look closely on the new growth tips autobro

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[Waira]

Is she in the hotter soil, AllMix I think? That's a wee bit of nute burn there, light burn doesn't manifest on tips like that.... Mind your leaf tips for clawing, that's N toxicity starting; I mention because she seems a deeper green than usual, under that type of light....
How far away are the lights now? ... tent size? that's a lot of light blasting in any case,...

:smoking: No dumb noob ?'s here mate, just folks who want to learn, and this is a very important thing to understand some. EC and TDS (total dissolved solids), these are related, in fact TDS (in ppm's) is an extrapolation off of EC, some folks just prefer ppm's as it's a more relatable measurement of the (nute) ion concentration in a solution; these are the dissolved solids . That said, ( @Shrederr ) with organic nutes (pretty sure BioBizz is mostly if not totally organic?), it's not always a good measure because some of the organic nutrient components are not ionic, still needing that breakdown by soil microbes to convert it into ionic forms the plant can take up.. Synthetics are already in those forms, so they can be measured directly....
Sleeper, get some inoculants going in there, critical for your organic grow IMO! They have serious work to do, makes for faster, better, more stable nutrient turnover and availability.... If you're stateside, the Staff favorite is Recharge, a great value plus it's extra goodies included (humic-fulvic, kelp)....

 

[Shrederr]

Is she in the hotter soil, AllMix I think? That's a wee bit of nute burn there, light burn doesn't manifest on tips like that.... Mind your leaf tips for clawing, that's N toxicity starting; I mention because she seems a deeper green than usual, under that type of light....
How far away are the lights now? ... tent size? that's a lot of light blasting in any case,...

:smoking: No dumb noob ?'s here mate, just folks who want to learn, and this is a very important thing to understand some. EC and TDS (total dissolved solids), these are related, in fact TDS (in ppm's) is an extrapolation off of EC, some folks just prefer ppm's as it's a more relatable measurement of the (nute) ion concentration in a solution; these are the dissolved solids . That said, ( @Shrederr ) with organic nutes (pretty sure BioBizz is mostly if not totally organic?), it's not always a good measure because some of the organic nutrient components are not ionic, still needing that breakdown by soil microbes to convert it into ionic forms the plant can take up.. Synthetics are already in those forms, so they can be measured directly....
Sleeper, get some inoculants going in there, critical for your organic grow IMO! They have serious work to do, makes for faster, better, more stable nutrient turnover and availability.... If you're stateside, the Staff favorite is Recharge, a great value plus it's extra goodies included (humic-fulvic, kelp)....

Thank you for the insights, sir.

 

[Sleeper143]

Is she in the hotter soil, AllMix I think? That's a wee bit of nute burn there, light burn doesn't manifest on tips like that.... Mind your leaf tips for clawing, that's N toxicity starting; I mention because she seems a deeper green than usual, under that type of light....
How far away are the lights now? ... tent size? that's a lot of light blasting in any case,...

:smoking: No dumb noob ?'s here mate, just folks who want to learn, and this is a very important thing to understand some. EC and TDS (total dissolved solids), these are related, in fact TDS (in ppm's) is an extrapolation off of EC, some folks just prefer ppm's as it's a more relatable measurement of the (nute) ion concentration in a solution; these are the dissolved solids . That said, ( @Shrederr ) with organic nutes (pretty sure BioBizz is mostly if not totally organic?), it's not always a good measure because some of the organic nutrient components are not ionic, still needing that breakdown by soil microbes to convert it into ionic forms the plant can take up.. Synthetics are already in those forms, so they can be measured directly....
Sleeper, get some inoculants going in there, critical for your organic grow IMO! They have serious work to do, makes for faster, better, more stable nutrient turnover and availability.... If you're stateside, the Staff favorite is Recharge, a great value plus it's extra goodies included (humic-fulvic, kelp)....

She’s in BioBizz LightMix. The lights are about 20in away now, in a 70x70x160 tent. I can’t raise them any higher now, and the plants are getting closer every day! I’ll keep my eyes open for any clawing, thanks for the advice on the N.

 

[Waira]

...... 20" is OK, but during stretch if they get too close, consider supercropping (bend/kink the stem 90 degrees),.. this works great, you just have to soften up the stem gently at first,... read up on it and you'll see,.... I had a Night Queen that kinked very easily, during early bloom before the stem really hardened up,.... she never blinked and the buds came out fine,...