If you are going to handwater, I highly recommend HydroHalos. They make it much easier to distribute evenly. A bit pricey for plastic rings but just attach some 1/2" tubing with a funnel for ease. I cut slits in my tent and run the tubes to the outside. Barely have to open it any more.
Everytime you water you should water to runoff in coco. Some don't but it makes it a lot easier to avoid salt build up. You really can't overwater it which is very nice.
I ended up getting a small R/O water machine. Your nute line should have enough Ca/Mg with tap that you won't need to add it. Plain Epsom Salt is Mg and S which are both good to add. If it looks like it needs a bump, I add Epsom Salt over CalMag. Tap usually has Ca but not Mg. You can also cut your tap water with gallons of distilled or purified water from the store. I checked the ppm on the purified, it was cheaper than distilled, read less than 50ppm.
Just ideas. It takes a little test and tune but I couldn't grow worth a darn in soil. Coco? Just mix nutes, check pH, and fertigate away! If things go awry you can just mix fresh nutes and flush until the plant is fixed up.
Oh since coco is semi-hydro you can follow MoGs hydro plan with megacrop.
.. seriously tho, don't think it was me.............but, ahem, I am rather partial to the odd joint or two, so........I can't remember hehe
ppp
