runninwivscissors Posted April 28 Share Posted April 28 Hi all, making the move over to Coco and I'm struggling a bit with understanding the ca/mg ratio and how to correct it. I'm going to be using Shogun Coco a+b and calmag. My water has a ratio of 4:1 in favour of magnesium. Should I not worry and just use the cal mag to bring my tap water ec to 0.4 and just crack on? Or do I just add calcium? Any help is appreciated. Link to comment Share on other sites More sharing options...
Shumroom Posted April 28 Share Posted April 28 We need the absolute amounts to be able to help with the correction Atb Link to comment Share on other sites More sharing options...
runninwivscissors Posted April 28 Author Share Posted April 28 114.53 mg 286ca Link to comment Share on other sites More sharing options...
Shumroom Posted April 28 Share Posted April 28 So you’re current ratio is actually 2.5:1 Ca:Mg which isn’t too bad. Some mono Ca will be required to bring it to 3:1 I’m not gonna attempt the calculations for the adjustment right now cause I’m a bit too high right now I’ll pop back later when my heads back on my shoulders Someone else can feel free to jump in Atb Link to comment Share on other sites More sharing options...
runninwivscissors Posted April 28 Author Share Posted April 28 (edited) Thanks for the help mucker, appreciate ya. Just for my info, will I still need to be adding the Shogun mg cal? Also for my own brain how did you get to 2.5 :1 with the figures I gave. I thought it was that 114 is 4x 286, I'm obviously wrong just wondering how it works. Maths is far from my strong suit. Edited April 28 by runninwivscissors Link to comment Share on other sites More sharing options...
Shumroom Posted April 28 Share Posted April 28 286/114.53 = 2.497 I just rounded up from 2.497 to 2.5 Actually I seem to recall @GSZZ mentioned a couple of times that the Shogun CaMg didn’t actually contain any Magnesium, so it might be the right way to go. What’s your growing method/medium? Atb Link to comment Share on other sites More sharing options...
runninwivscissors Posted April 28 Author Share Posted April 28 (edited) Handfed Coco mate Edited April 28 by runninwivscissors 1 Link to comment Share on other sites More sharing options...
Shumroom Posted April 28 Share Posted April 28 What’s your tap water EC? Atb Link to comment Share on other sites More sharing options...
runninwivscissors Posted April 30 Author Share Posted April 30 Sorry guys busy few days with work. I've ordered a new ec meter as I'm not 100% mine was working all that well. But initial reading was 1.0 ec seems a bit high to me. Link to comment Share on other sites More sharing options...
Shumroom Posted April 30 Share Posted April 30 Yeah that does seem quite high Atb Link to comment Share on other sites More sharing options...
KC Posted May 2 Share Posted May 2 If you got hard water you probably won't need to add any Calmag, a decent nutrient will have Magnesium in it in some form. I don't use coco but Ca deficiency is quite rare for me, not seen it in a couple of years and that was one cut. Also adding Calmag (intense) made absolutely no difference I found. Some people might need it but don't go worrying until you've come across the problem. 2 Link to comment Share on other sites More sharing options...
Wrh Posted May 2 Share Posted May 2 I use coco and canna nutes , my water is very hard so I use 4 parts rain water to 1 part tap water which leaves me a background ec of .1 I use leds mainly and don't use any cal mag I do have it but I don't add it and I don't have any issues 1 Link to comment Share on other sites More sharing options...
runninwivscissors Posted May 3 Author Share Posted May 3 Alright guys, new blu lab truncheon arrived, my tap water at room temp is 0.6 ec. Link to comment Share on other sites More sharing options...
Shumroom Posted May 4 Share Posted May 4 That’s on the high side of things, but I believe there’s a few growers on here with the same/similar water Your trick of mixing collected rain water and tap water to give a reading of EC 0.4 might be all you need to do now, plus it’s free Try just adding your nutes to that(no Calcium or Magnesium) and see if you encounter any problems. Atb Link to comment Share on other sites More sharing options...
runninwivscissors Posted May 4 Author Share Posted May 4 I don't have the means to collect rainwater 1 Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now