DIY DWC Nutes

Been using this formula for 9 years with RO water. I’ve changed out about 100,000 gallons (maybe a lot more) with this and it’s the most reliable (and most inexpensive) hassle free way to get away with not checking pH for up to 2 weeks in a 15 gallon res containing up to 2 plants growing to the max under a 600 watt light. Costs 10x less than anything store bought and it really works.

You will mix 3 parts plus 1 pH up mix (no need for pH down)

Part A
498 grams Monopotassium Phosphate
Top up to 1 gallon with warm RO water

Part B
667 grams Epsom Salt
Top up to 1 gallon with warm RO water

Part C

Part Micro

497 grams CaNO3

15.44 grams 11% Fe DTPA

7.27 grams 13% EDTA Mn

1.89 grams 15% Zn EDTA

1.26 grams 15% Cu EDTA

.89grams Solubor

.03 grams Ammonium Molybdate

Top up to 1 gallon with warm RO water

pH up
379.2 grams of Potassium Hydroxide flakes
Top up to 1 gallon with cold RO water but add the KOH to the water and never vice versa.

I put 700 ml C, 700ml B and 1400 ml A in 54 gallons of RO along with 200 ml of pH up. Really works for me .

Thanks for sharing your recipe. You run this from cradle to grave or titrate it in some fashion? What pH and PPM does it round out too?

HydroEnthused said:

Been using this formula for 9 years with RO water. I’ve changed out about 100,000 gallons (maybe a lot more) with this and it’s the most reliable (and most inexpensive) hassle free way to get away with not checking pH for up to 2 weeks in a 15 gallon res containing up to 2 plants growing to the max under a 600 watt light. Costs 10x less than anything store bought and it really works.

You will mix 3 parts plus 1 pH up mix (no need for pH down)

Part A
498 grams Monopotassium Phosphate
Top up to 1 gallon with warm RO water

Part B
667 grams Epsom Salt
Top up to 1 gallon with warm RO water

Part C

Part Micro

497 grams CaNO3

15.44 grams 11% Fe DTPA

7.27 grams 13% EDTA Mn

1.89 grams 15% Zn EDTA

1.26 grams 15% Cu EDTA

.89grams Solubor

.03 grams Ammonium Molybdate

Top up to 1 gallon with warm RO water

pH up
379.2 grams of Potassium Hydroxide flakes
Top up to 1 gallon with cold RO water but add the KOH to the water and never vice versa.

I put 700 ml C, 700ml B and 1400 ml A in 54 gallons of RO along with 200 ml of pH up. Really works for me .

Click to expand...

You might want to check your numbers cos if you pour 1400ml of Stock A into 54 gallons of RO you`ll have over 200ppm of P which is ridiculously high

Pics?

What Atomizer said. 1+pound of MKP in anything scares the shit out of me. You are clearly doing this based on experienced aqueous chemistry or handed it by someone who is. Can you break out some formulas so I understand how you derived your required molar concentrations? Precision down to the hundredth of a gram for micros doesn't come from "trial and error".

Also, how in the hell would you ever even consider a boron deficiency? I've grown for 25+ years and have never added borax to solution, even at less then a gram per 500 gallons.

So you use this for veg and flowering even with that high dose of MKP?

quick calc suggests there is only around 65ppm of N to go with the 205ppm of P and 327ppm of K, Mg 59 and Ca 85.
I use MKP for P, but its not remotely close to 200ppm, additional K is provided by potassium nitrate and/or potassium sulphate depending whether i need the N or not. Same for mag nitrate and mag sulphate. I prefer boric acid as solubor and borax both add sodium (Na).

I agree that P above 60ppm is ridiculously high, but if it works, it works. Imo, it's still better than paying for premixed nutes.

(yes, even 60ppm is probably too high, but it gives you a buffer. If you start at 30ppm, 1 week in if it goes to 25ppm, you have a small deficiency)

I just ordered a free sample of Mega Crop dry nutrients. Seems like there is little reason to DIY

HydroEnthused said:

6th week of flower, yes, but not the buds. They swell . Damn they swell.

Click to expand...

pix or it didnt' happen.

PetFlora said:

I just ordered a free sample of Mega Crop dry nutrients. Seems like there is little reason to DIY

Click to expand...

When you change out 450 gallons a week you have no choice but to DIY. Like the old saying goes...real niggas do real things. I don’t experiment...I produce.
I’m not an experimentalist. Playtime was over years ago and this aggressive formula works quite well and it’s very pH stable through a desirable range.
I don’t do it only to save money but that’s a bonus.

you gotta ask yourself where the excess P in the 450 gal you change out every week ends up. maybe its more accurate to say, i dont experiment, i pollute

PetFlora said:

I just ordered a free sample of Mega Crop dry nutrients. Seems like there is little reason to DIY

Click to expand...

Only if you want a dry version of advanced nutes though.

I considered mega crop but the fact i have used advanced for many years plus i didnt want brown nutes again

PetFlora said:

I just ordered a free sample of Mega Crop dry nutrients. Seems like there is little reason to DIY

Click to expand...

My 50 pound bag of yara calcium nitrate I got for 30 bucks disagrees with you. The control you get alone makes it worth it. There's no way I would ever go back.

Edit: And you're reasoning.... "because I got a free sample.". Maybe I misunderstood what you're trying to say here. You don't see the point of DIY because companies give you stuff for free?

Cold$moke said:

Only if you want a dry version of advanced nutes though.

I considered mega crop but the fact i have used advanced for many years plus i didnt want brown nutes again

Click to expand...

Oh shit. I hate brown roots too. I had thm with NPK RAW nutes. But, will only be using MC in one rez

churchhaze said:

My 50 pound bag of yara calcium nitrate I got for 30 bucks disagrees with you. The control you get alone makes it worth it. There's no way I would ever go back.

Edit: And you're reasoning.... "because I got a free sample." Maybe I misunderstood what you're trying to say here. You don't see the point of DIY because companies give you stuff for free?

Click to expand...

WTF? you quoting me isn't even my actual response (I just ordered a free sample of Mega Crop dry nutrients. Seems like there is little reason to DIY ). You need to stop responding when you're high. PLUS, calcium nitrate is only one ingredient AND I said 'seems like'... there are always exceptions

Atomizer said:

you gotta ask yourself where the excess P in the 450 gal you change out every week ends up. maybe its more accurate to say, i dont experiment, i pollute

Click to expand...

There cannot be an industry without pollution. The more I pollute, the more I produce. It’s not going into a municipal waste water system so it’s not so bad.