Fert burn or K deficiency?

[AnomanderRake]

That's still my answer. ^^^

Well, Biobizz say that you can use Biogrow every watering if you want...

About the light, I can tell it was a surprise for me. It's my first grow but here in my country I've seen a lot of peopple using it as the default for veg (HPS being the default for bloom). I will chek the ones you said out but do you think HQI light may be causing the problem with the leaves? In fact, only 2 of the plants are having this problem...

Thanks again!

[irydyum]

What do the instructions on the bottle say about dosages and frequency of use? Most nutrient products give a weekly schedule. (one application at recommended dosage per week) None I've come across are a 'feed every watering' formula.

Right as rain here. ONE application of recommended dose per week is all that's necessary. Especially in veg!! I've used BioBizz for a couple years and the only time I ever double up on a feeding in one week is from about week 4 to 6 of flowering. BioBizz isn't the most aggressive nute system available so I like to pack a punch in the middle of flower.

The rest was of course spot on too, just didn't want to quote the whole thing:thumbsup:

Anomander, consider yourself lucky Rusty stopped in to help you.

BTW, you said your tap PPM is only 30 right? Might want to look into some CalMag to add with it. BioGrow doesn't contain them to my knowledge. I had a small lightening once when i used BioBizz and bottled water. Went back to my tap at 280ppm and it cleared things right up. Found out later on that the bottled water only had about 15ppm in it.

[AnomanderRake]

I am very greatfull for all the advice guys! :thumbsup:

.. But I am a little confused... Is the problem with the leaves caused by using biogrow every watering, biogrow+bottled water, wrong light... All the above options?

thanks!

[irydyum]

Ibiogrow+bottled water

IMHO and experience it's this one. Though all of them may be contributing factors, I know for a fact through experience that those 2 don't play well together. You must have Calcium and Magnesium, if you don't, it'll only get worse because the plant needs even more CalMag in flower.

Just my :twocents:

[AnomanderRake]

Thanks a lot!

One more question: my tap water smells of chlorine. Is it a problem for the plants?

[khyberkitsune]

I've personally never had a problem using HQI Metal Halides, and the double-ended construction actually makes for a smaller-profile lamp. I've always used HQI on aquariums, as they penetrate hardcore through water, and I've found them to be just as effective in the grow room.

[Rusty Trichome]

It isn't just one issue, it's a combination. Nothing devastating, but a slow build-up of issues. Tiz part of the learnin' process though.

If you are going to feed every watering, you'll have to adjust dose so you are giving the same ammount of nutrients per week. If bottle says 1 tsp per gallon per week, then two waterings with 1/2 tsp per gallon is acceptable.
1 tsp per gallon every watering would kill the ladies. (this is just an example, not actual instructions)

Thanks a lot!
One more question: my tap water smells of chlorine. Is it a problem for the plants?

Let it sit-out (uncovered) overnight. If it still smells like chlorine, they are using chlorine solids in your municipal water system, which would need filtering-out. (reverse osmosis)
I use molasses instead of CalMag.

I've personally never had a problem using HQI Metal Halides, and the double-ended construction actually makes for a smaller-profile lamp. I've always used HQI on aquariums, as they penetrate hardcore through water, and I've found them to be just as effective in the grow room.

You should try some 'good' lighting sometime. You'll never go back. :thumbsup:
Having kept coral and reef tanks, I'm very familiar with trying to use aquarium lighting and equipment for my growrooms. (HQI's, pumps, bubblers, actinic bulbs, 4-pin fluoro's...) HQI is a sub-par choice. Given a choice between HQI and CFL's...I'd go with the CFL's. At least you can provide the correct spectrum(s) and the heat usually isn't an issue.

[AnomanderRake]

Thanks Rusty for the help! :thumbsup:

[khyberkitsune]

"You should try some 'good' lighting sometime. You'll never go back."

Why do you think I went LED?

[Rusty Trichome]

Perhaps LED's are the wave of the future, but for now I'll stick with my CFL's for veg, HPS (and UV) for flower. Only thing that beat's it is growing outdoors. And then...just barely.

I've followed Str8's LED grow since his return from overseas, and yes...good buddage is possible. :thumbsup: He's done one hell of a good job, especially with a budding new technology which is still being dialed in and perfected. (as an industry)