Mixing nutrients from salts

Is anyone using fatmans coco recipe? Or a similar recipe that works well in coir?

How do you feel about the results?

DTW coco is quite expensive but I can purchase enough salts to last me years and years for the equivalent of about a months worth of pre-mixed nutrients.

from what i've read, most of fatman's advice is solid

i use H3AD's formula for coco since i'm fairly new to growing in coco. i generally tried to use powder nutes though when i was doing dwc.

IF managed properly DTW uses the same or less gallons of nutrient solution than recirculating systems that are changed out every 7-10 days. Good luck; the recipe looks ok to me, I would add potassium silicate ( before adding part 1 and 2) less is more and adjust ph.

A e o n said:

IF managed properly DTW uses the same or less gallons of nutrient solution than recirculating systems that are changed out every 7-10 days. Good luck; the recipe looks ok to me, I would add potassium silicate ( before adding part 1 and 2) less is more and adjust ph.

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I'm no expert on hydro so I really don't know but that would equate to dumping a hundred litre bucket every 3rd day given the of runoff you need with coir. 10x15 litre pots even at @10% runoff watering twice daily which is about the bare minimum I need... You get the drift.

Comparison aside, shits expensive!

Historically I used 40 gal res for m2 grow space with recirculating, replaced every week, and now I use half as much with DTW (40 gal res for 4 x m2 grow spaces filled 2 times a week (even if I used double the volume of solution it would then be the same as recirc). Again been doing this for a long time and took a while learn the tricks to get it honed in. I do run a custom style few if any use. I get 1.5-2.25 lb per m2 no co2. Use mineral salts, its very inexpensive, give jacks 3-2-1 a go if you want its tried and true

A e o n said:

Historically I used 40 gal res for m2 grow space with recirculating, replaced every week, and now I use half as much with DTW (40 gal res for 4 x m2 grow spaces filled 2 times a week (even if I used double the volume of solution it would then be the same as recirc). Again been doing this for a long time and took a while learn the tricks to get it honed in. I do run a custom style few if any use. I get 1.5-2.25 lb per m2 no co2. Use mineral salts, its very inexpensive, give jacks 3-2-1 a go if you want its tried and true

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I've no doubts you are a very skilled grower, I just have a hard time visualising how that's working for you in a domain that's new to me.

I'm watering slowly with a wand in 3 passes twice a day soon to be 3x monitoring run off and this is my first coco grow hence the KISS delivery method. I've used home made soilless for years, peat/compost + amendments and done alot better than other guys both product and harvest wise - 1-1.2lb per 600 a m2. Literally "dirt cheap" bud, I even had my own worm farms. At one stage I was growing half oz colas in 2.4 litres (about half a gallon?) in soilless mixes under 400 watt hps at a rate of 36 plants/m2. The older I get the heavier those bags and huge pots get (last runs were 50 litre fabric pots @ 41 then 37 ounces x2 600 hps in 2.4x1.2. Buying salts in raw form is marginally cheaper than making 400 litres of super soil, lots lighter and will last longer.

Aside from wanting to learn more, there's a geographical aspect to this. Jacks 3-2-1 just wouldn't be economical to post to me.

5 litres of premix A-B runs at about $100 and for that price I can have 50% of the base materials I need to put the above recipe together and last a very long time.

SilverFoxTails said:

I need to put the above recipe together and last a very long time.

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start a thread when you do.

did fatman post what the npk values are of his veg and bloom formulas?

rkymtnman said:

start a thread when you do.

did fatman post what the npk values are of his veg and bloom formulas?

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I may do that.

No, it was copied into another forum containing discussion of various formulas by a 3rd party.

SilverFoxTails said:

I may do that.

No, it was copied into another forum containing discussion of various formulas by a 3rd party.

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Link to thread

I mix my own but haven't made a stock solution yet. I use the same ratios as athena with slightly less sulfur so I can add some potassium silicate rather than potassium sulfate. The potassium silicate keeps the ph stable and silica is good for strong branches.

For the veg formula I use pek acid rather than mono-potassium phosphate so the ph comes out to 6. If I used MKP it would come out too high.

Veg Formula per gallon: 6 ph don't remember ppm I think it's around 750

500mg potassium silicate
675mg pek acid
585mg potassium sulfate
100mg chelated micros by plant prod
1.345gr magnesium sulfate
630mg potassium nitrate
2.325gr calcium nitrate

Flower formula per gallon: 930ppm & 5.9 ph

200mg potassium silicate
1.175g monopotassium phosphate
1.425g potassium sulfate
115mg chelated micros by plant prod
1.545g magnesium sulfate
2.715g calcium nitrate

If my plants are eating less than the ppms I'm mixing I just water it down with ro water after mixing but I always use these ratios because the ph comes out perfect without needing ph up or down.

It's not hard to mix your own fertilizer. These overpriced fertilizers are the same ingredients coming from the same factories. None of it is rocket science, require a PhD or anything more than a basic understanding of plant nutrition and chemistry. The formulas are all pretty similar. Just start with a micronutrient blend and build on top of that.

If you start with a good micronutrient all you need is calcium nitrate and MKP. I've used this for years. Cheap as hell.