6/9 head formula with ro water question

[ur420ducks]

I got a RO filter for flushing and would like to use it for all my watering but I cant figure one thing out. Im using the 6/9 micro/bloom gh formula and with tap water camg+ isnt needed but i hear that with ro water you need to add it. I was wondeirng if anyone had any insight on this or if they know of a nute calc where I can figure it out any help is appreciated, thanks

 

[Andyo]

doesnt sound exactly right,

doesnt sound exactly right,

So whats your tap water ec/ppm before you put it through the ro unit?
I think it should be more the case with hard water nutes.
Ok in general hard water nutes will have 35% less calcium in.
Soft water nutes no worrys theyll be high in calcium.
And of course the RO water will have none.A

 

[Guest 18340]

Yeah, whats the ppm's of your tap water?
I've used Heads/Rez's 6/9 formula with RO water and most of the time I did not get a cal/mag def.
I switched to full on tap as a matter of convenience.
My tap is 300ppm (so full of cal you can smell it)
Imho, RO doesn't always require the addition of calmag.
I always used the regular GH, not the hard water formula. Even with my 300ppm tap.

 

[benzo]

i use 6/9 with 5mls of Magi-Cal per gallon of my RO.

When I didn't, i saw a cal mag def.

Now, I do know some people with ro don't use cal mag, and some do. but this is how it works for ME.

Check out my grow link, happy plants so far

http://www.icmag.com/ic/showthread.php?t=183245

 

[BlueberryLovr]

Just run with the 6/9 or whatever and observe your plants. Adapt. Be flexible. No need to follow schedules and 'recipes' to the dot. While benzo needs to add ca/mg, I don't! And I also grow Blueberry in coco + a batch in hydro. Just read your plants and keep it simple. Don't over-think it.

 

[ur420ducks]

my tap water ppm before it goes through the ro is 175

 

[Guest 18340]

my tap water ppm before it goes through the ro is 175

I would use that tap water all day long...

 

[Tropic]

Here's a nice nute calculator... it already has the (US) GH nute profiles...
http://www.angelfire.com/cantina/fourtwenty/articles/profiles.htm#profilecalculator