Dialing In MEGA CROP for Auto's

[Caper123]

Should I start cal mag at the recommended .5 grams a litre in early veg?

 

[Mizzo81]

@Greenleaf Nutrients do u have any updates for us on the changes made to most of the products we use. Thanks for any info

 

[HemiSync]

Should I start cal mag at the recommended .5 grams a litre in early veg?

I always use cal/mag, but that’s because I know my situation needs it. What is your growing medium and lighting? Those two things have a big effect on if you use it and how much. Personally I would never start a grow without at least 0.25g, that gives me right at 100PPM/0.20EC in my water.

 

[elcoloan]

I always use cal/mag, but that’s because I know my situation needs it. What is your growing medium and lighting? Those two things have a big effect on if you use it and how much. Personally I would never start a grow without at least 0.25g, that gives me right at 100PPM/0.20EC in my water.

according to their calculator, 0.26 g are equivalent to 277ppm/0.55 EC... are you using the new formula or why is it different?

 

[HemiSync]

according to their calculator, 0.26 g are equivalent to 277ppm/0.55 EC... are you using the new formula or why is it different?

I don’t use calculators, I use my EC meter and here’s what I get and I’ve been getting these same numbers with an old bag of their cal/mag for over 7 months that my latest grow has been running. I start with rainwater that is 0.01EC in an eighteen liter bottle, the bottle could have 0.25 liter more or less. If I add 5g of CM, which is 0.28g per liter then I get 0.21EC. If I add 9g, 0.5g per liter, I get 0.40EC. Again, I have never even looked at their ppm calculator and these are just the numbers I record every week.i try to feed my girls based on their needs not someone’s chart.

 

[Simplicio]

An easy way to dose MC is to sit a small jar of it on a 0.1 accuracy scale, and then remove as many grams as you want with a measuring spoon, while the scale reads a negative amount equal to the positive amount removed.
My measurements on the bag of MC that I have is that 1 gram added to 1 gallon RO water leads to a ppm of 128, minus my RO ppm of about 15, for a usable ppm of about 110.

 

[elcoloan]

I don’t use calculators, I use my EC meter and here’s what I get and I’ve been getting these same numbers with an old bag of their cal/mag for over 7 months that my latest grow has been running. I start with rainwater that is 0.01EC in an eighteen liter bottle, the bottle could have 0.25 liter more or less. If I add 5g of CM, which is 0.28g per liter then I get 0.21EC. If I add 9g, 0.5g per liter, I get 0.40EC. Again, I have never even looked at their ppm calculator and these are just the numbers I record every week.i try to feed my girls based on their needs not someone’s chart.

ahhh dumb me, your were talking about Cal-Mag, sorry

 

[pop22]

 

[pop22]

No more additional cal/mag needed!

 

[thetreeman]

View attachment 998966

Ordered, came out to about $6 for shipping FWIW