Star Dog
Well-Known Member
I will pick it up in time I'm just unfamiliar with it all atm.
I'm not sure if this would be ok... I could mix up a gallon of canna then add 0.66g mpk then test the ec, that should give me a ball park ec figure... I think?
Monopotassium Phosphate (MPK) vs Potassium Phosphate (K)?
- Thread starter calvin.m16
- Start date
I'm not sure if this would be ok... I could mix up a gallon of canna then add 0.66g mpk then test the ec, that should give me a ball park ec figure... I think?
jimihendrix1
Well-Known Member
Sounds logical. I dont see why it wouldnt work.
Star Dog
Well-Known Member
jondamon
Well-Known Member
Don’t forget that 0.66g was for @jimihendrix1 5 gallon mix!
jimihendrix1
Well-Known Member
The .66 Grams is what is recommended for 1 gallon at full strength.
I grow in Promix BX, and feed with each watering, so I dilute the mix because of the frequent feed, and type of medium. I dont feed full strength.
The above mix is for each gallon of water. I just use a diluted ratio.
Notice the instructions say Per Gallon of water.
4-20-39 Recipe – For a great baseline would be 2 grams per gallon water for 4-20-39, 2 grams per gallon of water for CaNO3 and 2/3 that amount of MgSO4 (1 1/3 gram per gallon of water). We suggest you try to keep your pH right around 6.2 for the duration but some fluctuations are not uncommon. During middle weeks of flower, you can add 1/3 the amount of MKP for extra K (potassium). Certain strains can tolerate a higher EC than others and you are welcome to push those strains if you like but we feel the base mixture will do a great job,
Star Dog
Well-Known Member
Yes I'm with you there, I'm planning on mixing up a gallon at 0.66g to see what the ec is then take from there.
I've got 2 plants I don't care about (loosely speaking) so I intend to feed them at elevated levels of mpk and the rest of the crop at maintance levels.
jondamon
Well-Known Member
I’ll keep saying it as I find it a big help but dissolve 14g of MKP into 100ml of water and use at 1ml per litre for 0.1EC increase lol.
Star Dog
Well-Known Member
I've got that but I intend to experiment and find out 1st hand myself what difference it really makes.
jondamon
Well-Known Member
No idea lol.
Thankfully a guy on here @spek9 helped me as he had a metric tonne of MKP and wanted to find max saturation point and see if he could get it to be 1ml per 1litre of concentrated solution to increase nutrient solution EC by 0.1 at that dilution rate.
He found 143g to 1litre was max saturation of the MKP in the water
so I reduced it to a more manageable amount for my requirements. Lol.
jondamon
Well-Known Member
If this was me I would also be elevating those levels of Ca and Mg from the standard 5:2 of the canna Coco A/B as the additonal KP can play havoc with the rootzone if you go too strong.
And I found the additonal Ca helped with the CEC of the coco when feeding the MKP fairly strong.
Star Dog
Well-Known Member
That's really handy to know I was planning to increase the mg and cal but not right away, I've not gotten around to working out a stock solution and wasn't in a hurry so I'll get on it asap.
Have you ever had any problems with precipitation mixing magnesium with mpk?
The plants I'm testing on aren't part of my crop I kept a couple extra to test mpk, calcium and magnesium on, I don't aim to hurt them but if i do there will something learned along the way.
Cheers!
jondamon
Well-Known Member
To be honest with you I’ve not seen anything but this is what I’ve got.
plant magic calmag liquid
Epsom salts dry
Canna magnesium liquid
MKP dry
As you can see the only dry I do have is MKP and MgSO4.
the MKP I make a stock solution and the MgSO4 I tend to use during later flower +4weeks and I tend to mix one 0.1EC into my solution but I do it gradually pinch at a time in some luke warm water to help it dissolve until My res reads 0.1EC higher than it was.
I cant say with any certainty About precipitates as it’s only the MgSO4 that’s dry lol.
When mixing my Base A/B, MKP stock solution and the MgSO4 separately into my 25L refill container I don’t notice anything.
Star Dog
Well-Known Member
This might helpful for mpk user's.
https://www.growbarato.net/blog/en/how-to-grow-bigger-buds-on-cannabis-plants/#Big_Boom_PK_52-34
Check this
https://www.growbarato.net/en/boom-nutrients-nutes/2757-big-boom-weight-booster.html#/capacity-50g.
Mpk powder is exactly the same less the inflated price tag for 50g
I got a pound from ebay it cost me £4.75 iirc.
https://www.growbarato.net/blog/en/how-to-grow-bigger-buds-on-cannabis-plants/#Big_Boom_PK_52-34
Check this
https://www.growbarato.net/en/boom-nutrients-nutes/2757-big-boom-weight-booster.html#/capacity-50g.
Mpk powder is exactly the same less the inflated price tag for 50g
I got a pound from ebay it cost me £4.75 iirc.
Onextremebuzz
Well-Known Member
I picked up a 25KG bag from my farmer supply store earlier in the summer, I do a lot of experiments and this is one of them. Be careful it's potent 50 grams per 20 gallons of water creates a pretty decent solution I went as high as 75 grams. Use it once a week at the absolute max or depending on the plants are feeding anymore you will create a low pH environment and your plants will get iron magnese and aluminum poisoning as well as many other issues.
coreywebster
Well-Known Member
You still using it?
How did you find it?