Hola--amigos--Astro y Waira.
Yes, Waira coco plants are going to always have slight yellow tips--mostly the uptake when hot and often just Iron. Seems most grows are yellow tipped, regardless, of substrate when grown indoors.
The cal/mg issue come up for me right at flowering. This time much better.
The deal is as Cervantes mentions is that cal/mag are available--freely--in hydro/coco--right at 5.5 PH.
Still at any range 5.5 to 6.2 PH will get cal/mg just not like in soil.
Adjusting PH from time to time can help. At the right time.
I have to disagree with what we have been saying about --LED's and cal/mg uptake. The way it is absorbed would have nothing to do with LED lighting. Could be slow due to low LED light level coupled with poor root environment and temp therein or just run of the mill lock out.
All in all I am pleased for typically my plants show lots of cal/mg issues to varying degrees right at flower and into first two weeks.
Mine have about 2.5 to 4 weeks left. Hoping Narcos get rolling more this week and have all ready near three weeks.
In fact, they have so much (except for two) green that I could probably run just h2o and still get a good yield with a bit of micro added.
Do you have harvest photos up?
BTW--going to try a new and improved dry/cure. After review seems I have been mislead (my own misleading) as to best kiss method of dry/cure. Hint--going to fully manicure(not hang branches), dry and use curing bags (special ones--not brown paper bags or turkey bags). Didn't realize how much temp affects curing. Jars are good for storage but think I will do better with bag curing in this environment. Going to only use Bevido when necessary to rehab buds or long term in jar. Cures make the difference.
Cheers
Yes, Waira coco plants are going to always have slight yellow tips--mostly the uptake when hot and often just Iron. Seems most grows are yellow tipped, regardless, of substrate when grown indoors.
The cal/mg issue come up for me right at flowering. This time much better.
The deal is as Cervantes mentions is that cal/mag are available--freely--in hydro/coco--right at 5.5 PH.
Still at any range 5.5 to 6.2 PH will get cal/mg just not like in soil.
Adjusting PH from time to time can help. At the right time.
I have to disagree with what we have been saying about --LED's and cal/mg uptake. The way it is absorbed would have nothing to do with LED lighting. Could be slow due to low LED light level coupled with poor root environment and temp therein or just run of the mill lock out.
All in all I am pleased for typically my plants show lots of cal/mg issues to varying degrees right at flower and into first two weeks.
Mine have about 2.5 to 4 weeks left. Hoping Narcos get rolling more this week and have all ready near three weeks.
In fact, they have so much (except for two) green that I could probably run just h2o and still get a good yield with a bit of micro added.
Do you have harvest photos up?
BTW--going to try a new and improved dry/cure. After review seems I have been mislead (my own misleading) as to best kiss method of dry/cure. Hint--going to fully manicure(not hang branches), dry and use curing bags (special ones--not brown paper bags or turkey bags). Didn't realize how much temp affects curing. Jars are good for storage but think I will do better with bag curing in this environment. Going to only use Bevido when necessary to rehab buds or long term in jar. Cures make the difference.
Cheers
Plenty, to offer a nice change-up with the heap of Narco' you've coming, and all the rest! 
Cheers brudda!
