[p0opstlnksal0t]

If you recirculate with any nute how do you know what your plants have stripped out of the feed water? how do you know the ratios in the runoff that get drained back to your res? therefore how do you know how much of each macro to put back into the res at fillup?

[Zeez]

Originally Posted by beta

Never ever ever ever feed coco plain water until final flush, you will strip the cation bank and your plants won't have access to any calcium or magnesium until that bank is satisfied again.

I've had good results with this. When runoff ppm gets too high I put 10-15 gallons per plant of fresh water watching the runoff ppm. When it the runoff numbers get low, then the plants get another feeding of fresh nutes and back on schedule. It's more about giving the plants what's in the res and detoxing the excesses of what they didn't need.

My feeding system is set up on Zwave switches making it possible to sit in a chair and do this with voice command or an iPhone. All I have to do is flip two valves to dump the reservoir when the flush returns get too high. Then the res refill is back to auto. That's why I asked about dosing pumps before I knew Jack.

Originally Posted by p0opstlnksal0t

If you recirculate with any nute how do you know what your plants have stripped out of the feed water? how do you know the ratios in the runoff that get drained back to your res? therefore how do you know how much of each macro to put back into the res at fillup?

I just go with a clean res every other fill. It's been working well. There were a few problems with the mix getting too rich that were cured with dialing the mix back to 1100-1200 to start.

[caljim]

Originally Posted by beta

This is a HUGE mistake. Nutrients like Jacks are sold as two separate parts for a reason. If you combine them together at concentration they will react with each other and your nutrients will precipitate out of solution, making them unavailable to your plant.

Never ever ever combine concentrated nutrient solutions. Mix each into the rez at working strength before adding the next.

I have been doing this for a couple years.

There is no precipitation at that concentration, and the stock can stand for weeks without anything falling out..ever. The 5 gallons dilutes out to about 60 gallons at 1.2ec.

Dont knock it till ya try it.

[Miraculous Meds]

Originally Posted by p0opstlnksal0t

If you recirculate with any nute how do you know what your plants have stripped out of the feed water? how do you know the ratios in the runoff that get drained back to your res? therefore how do you know how much of each macro to put back into the res at fillup?

You don't without detailed testing. Have you read lucas nute profile info and story though? He ran something like 2 full veg and flower cycles, recirculating, before he ran into nutrient def issues, before he changed his res. I believe there is a point of unbalance based on environment, res size, etc... I could run my old 25 gal recirculating for 30 days before draining and replacing. A lot of people recommend 2 weeks before draining and replacing.


the balance is to top off the res to the nutrient strength you desire. So If your 1.2ec to start, just add enough water to bring the res level back to full, and enough nutes, to full strength 1.2ec. I simply put mine on float valves connected to a bulk res keeping the water level full all the time. Once a week or so I might have to add plain water to lower the ec.

[Miraculous Meds]

Originally Posted by beta

This is a HUGE mistake. Nutrients like Jacks are sold as two separate parts for a reason. If you combine them together at concentration they will react with each other and your nutrients will precipitate out of solution, making them unavailable to your plant.

Never ever ever combine concentrated nutrient solutions. Mix each into the rez at working strength before adding the next.

I think you got confused. He is diluting them in 5 gallons. With a starting amount of 100g of jacks and 82g of cal nit, I don't think he stands any chance of precipitation or fall out. Proven by his years of experience doing so. that's for much higher concentrations, like when you make stock solution, like I do, with 880g jacks per 1 gallon. His 20g jacks per gallon is only 2% of my concentration. Now if you mixed my stock concentrations together, it would precipitate out. It is good advice to never mix concentrated 2 parts together before you mix them in the bulk amount of reservoir water though.

[p0opstlnksal0t]

Originally Posted by Miraculous Meds

You don't without detailed testing. Have you read lucas nute profile info and story though? He ran something like 2 full veg and flower cycles, recirculating, before he ran into nutrient def issues, before he changed his res. I believe there is a point of unbalance based on environment, res size, etc... I could run my old 25 gal recirculating for 30 days before draining and replacing. A lot of people recommend 2 weeks before draining and replacing.


the balance is to top off the res to the nutrient strength you desire. So If your 1.2ec to start, just add enough water to bring the res level back to full, and enough nutes, to full strength 1.2ec. I simply put mine on float valves connected to a bulk res keeping the water level full all the time. Once a week or so I might have to add plain water to lower the ec.

No I have not read that but it sounds like a must-read I know Delta runs recirculating in his PPK system very effectively I'll see if I can find that Lucas the red you mention

[eric2028]

So I’m seeing quite Afew growers making their own nutrients and designing their own profiles to match cannabis requirements. I’m currents running jacks 321 in pure coco and loving it btw. I d like to fool around changing my values alittle or at least fully grasp the ability to do so. Is there a good read/thread someone can recommend? Or even if someone can explain in detail how they calculate their own? Thanks in advance!

[Speed of green]

I sent a water & fert sample to jr peters for analysis.

The water sample is plain municipal water, the plants seem to grow okay with it but i get a lot of precipitation with the jacks when mixing my reservoirs.

The fertilizer sample is jacks & calcnit mixed 3g/2g per gallon.

i am not sure if my water is compatible with jacks, anyone see an obvious issue?

thanks!

Fert sample


Tap water sample

[Miraculous Meds]

Originally Posted by Speed of green

I sent a water & fert sample to jr peters for analysis.

The water sample is plain municipal water, the plants seem to grow okay with it but i get a lot of precipitation with the jacks when mixing my reservoirs.

The fertilizer sample is jacks & calcnit mixed 3g/2g per gallon.

i am not sure if my water is compatible with jacks, anyone see an obvious issue?

thanks!

Fert sample
View Image

Tap water sample
View Image

Im far from an expert with water analysis, but what would concern me is the level of alk, which I believe is alkalinity, and that's why your tap ph is above 7. And that's whats driving your ph to 6.3 after nutrients. that's ok for soil, but just on the high side for hydro.


Also of concern is the 50 or 60 ppm of sodium. that's no good for plants.


Cl is on the high side too. Id probably ro that water and use 1/2 tap, 1/2 ro. but your damn na n cl would still be a bit high maybe, just 25% tap. or a good sediment n carbon water filter might get you where you need to be.

[Budley Doright]

MM as far as Im concerned is a very accomplished grower but I would like to say a bit on this thing...

YOu say your plants look fine but......

You posted numbers for your tap and over 7 not a good thing..

However you add jacks and calnit and you end up with what is commonly referred to as slightly acidic.....

When I first started jacks I had a fancy machine to test ph....

Now I use simple drops.... I shoot for slightly acidic

So my water plus jacks is slightly acidic...

Ive messed around with ph some....

I havent noticed a difference....

You should celebrate the fact this product was made for 'small indoor growers'

and its just not really that fussy....

Im ok with the fact that everything is pretty darned good.....and I do nothing

instead of me having to f with little shits.....

JMO