Grow Mediums How much calmag do you put in with tap water for coco?

I always add calcium as a ppm to of 15% to my total feed, but I cannot use tap as my tap comes in at 300ppm plus without a nutrient. I used to prebuffer and never had calcium issues when using a complete nutrient(mega crop is my favorite).

I will be honest though pre buffering coco is a pain in the ass and I don't buy bagged coco.

I would try RO water regardless of your decision it takes unknowns out of the equation and gives you a consistent starting point.
 
I am using gh calmag with tap water for 2 auto plants in coco in the 3 gallon pots on day 36 that are in flowering now. I have been doing around 2.5 ml/gallon of calmag with the water but I only water 1 time per day and the plants look like they have calmag deficiency. I do not water to runoff and I only put calmag with silicon in the water. I have dry amendments in the coco. If you only water the coco 1 time per day how much calmag would you put in with the tap water on there?
For some reason my brain is telling me that can not be a cal/mag deficiency. You have cal/mag in your nutes, you have cal/mag in your tap water, and you are adding extra cal/mag. Sounds like maybe to much creating a lockout not a deficiency? I use RO water and add cal/mag...but when I used tap water I did not.
 
I am using gh calmag with tap water for 2 auto plants in coco in the 3 gallon pots on day 36 that are in flowering now. I have been doing around 2.5 ml/gallon of calmag with the water but I only water 1 time per day and the plants look like they have calmag deficiency. I do not water to runoff and I only put calmag with silicon in the water. I have dry amendments in the coco. If you only water the coco 1 time per day how much calmag would you put in with the tap water on there?
For some reason my brain is telling me that can not be a cal/mag deficiency. You have cal/mag in your nutes, you have cal/mag in your tap water, and you are adding extra cal/mag. Sounds like maybe a lockout not a deficiency? I use RO water and add cal/mag...but when I used tap water I did not.
 
If you are growing with coco, or really any soil less medium and not watering to runoff regularly (best to do with every watering) then you are doing it wrong.

There are exceptions to this of course, but if you are using any salt based nutrients in really any medium then you need to water to runoff. Even with light feeding salts will build up in the root zone and cause all sorts of problems.

Study up on calmag and coco and it will all start to make more sense. You are getting lots of good advice here, ya just gotta take it.
 
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