Vick_Vinegar said:

DLI is the totally accumulation of photons over a 24hr period. Just a fancy way to say light intensity. Measures the total amount of photosynthetic flux in moles over a m2 over a single day. An average photoperiod is around 30-50 moles of flux per day. The lower your accumulation of flux, the less of a metabolic load it puts on the plant.

Just ignore all the stupid words and just pretty much think of it as your light intensity accumulated over 24hrs.

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Vick_Vinegar said:

When you flushed, did you put any feed on at the end of the flush? For example, did you put through 6.5 gallons of Ph'D water and then 0.5 gallons worth of base feed mixed up at 1.2-1.5ec?

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Arny420 said:

How would one figure that out?

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Arny420 said:

Wow no I didnt. Just 7 gallons ph down to around 5.9. So thats where I messed up. So when I flush to fix something I should do a lower then veg amount of nutes at the end of the flush?

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Vick_Vinegar said:

There are a bunch of DLI calculators (I use waveform lightings) if you have a way of measuring your PAR/intensity. You just add your intensity and your photoperiod length and it will tell you what your total DLI is. Between 30-50 is about average flowering.

If you don't have access to a PAR meter you can measure lux with a lux meter and divide the number by 0.015 to get rough PAR.

For example about 950umol/s over 12hrs is around a DLI of 40.

Looks like you are running something like an fc4000 320w bar light. At 75% and 10" or 100% at 12-14" will give you a DLI of 40.

Don't worry about trying to take it all in though. Just a few references. All you really need to know is that dimming the lights a bit will ease the load on the plant.

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Vick_Vinegar said:

I'd just put what your usual base feed is for the time. I'm usually at around 1.2-1.8 depending on how the plant is feeding but i was feeding twice a day in Coco.

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Arny420 said:

I am using coco and the last run disnt have a problem at all. I really think its because its been vegging for so long very root bound

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Vick_Vinegar said:

Coco can just be picky sometimes if the starting buffer is out too. Will either try and steal you potassium and release ca and mg into the medium or steal your calcium and magnesium and leech potassium and sodium into the medium.

Can happen if you are getting drybacks too often as well.

I didn't go through the whole thread sorry, but was the Coco buffered, and have you been providing adequate ca throughout the grow?

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Arny420 said:

Yes it is already buffered coco. I just recently added some calmag. So I need to keep adding cap mag from here on out then huh?

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Vick_Vinegar said:

Have you done a slurry test of the medium to get a gauge on the pH of the root zone? Sorry if you've been through it all, I just couldn't be bothered going back now haha.

If you put a slice in the fabric pot, steal a bit of medium near the thick of the root zone and mix it with distilled/RO water, it'll either move to acidic or alkaline. If it drops rapidly your too acidic, and if it rises alkaline at all you need to shift down.

Sometimes the runoff isn't completely accurate and a slurry test is the best bet to get a good grasp on the root zone environment.

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Vick_Vinegar said:

Yes, pretty much all the time...that's what keeps the CEC/buffer in Coco stable...adding the cal mag is not for the plants to consume, it's mainly to stop the Coco from stealing what ca is in your medium, base water and base feed and releasing the salts and potassium it's built up over time.

It may start off as buffered but over time the buffer will drift if the calcium and magnesium is not supplied in a supplemental form.

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Vick_Vinegar said:

Got some solid bushes going on mate. Glad they picked up a bit.

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