Cal-mag and ppm

im having a brain fart. im pretty frakkin sure that the ppm should be small. been awhile since i used cal/mag plus, but i know forsure it was between 50-250

 

test it! get a gallon of water and test the ppm then add the mag and test again

 

I calibrated my ppm and p.h. meter today and did a test on 0ppm r.o. water and got:
Fulvex at 3ml./gal. = 40ppm
CalMag+ at 3ml./gl. = 135ppm.
Fuvex and CalMag+ at 3 ml./gallon each = 175ppm
P.H. at 4.5 after adding Fulvex and CalMag+
6 drops of P.H. up from Botanicare brought P.H. to 7.2
[SIZE=12pt]PPM went from 175 to 183 after adding P.H. up.[/SIZE]

 

Starting at 7ppm I get to approx 250ppm using 5 ml's calmag + ...  Hanna meter 

 

I know this is old but, using the recommended amount of 1.75 tsp per gallon, for about 2.5 gallon of RO I got a ppm moving from about 0 to 630ppm at that amount, which was about 4 tsp. That seems huge no?

 

I never use that much! 2 - 3 ml per gallon. Fuck what the bottle says. It just wants you to buy more...

 

Thanks Crankz. I'm doing a res change this weekend and will back way off.


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200 ppm should be a good starting point. You can always dose the res with a little if you got a strain that eats it up. Or supplement with a little Epsom salt periodically.

 

I'm sucking all the res water out with a pump since I've scrogged. That'll still leave some amount of residue. That's cool I guess. The new nutes arrived. I'll use those tomorrow in the change. Been reading about CO2 a lot. Thinking of doing a home made sugar/yeast/water thing for my DWC grow that's about 6 weeks into 12/12 too.


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Crankz is right 200-250 is good. Fourth your nutes.


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