If you decide to switch to jack which I highly recommend.
Save them, there are strains you may grow in the future that Jacks is second and I use canna for them. If you never intend to do some of the medical strains that are hard to grow and require different nutrient ratios, then use them up. Don't switch in bloom but in veg I switched more than one grow, I have help with, over to jacks at 50% for 5 days don't flush in coco unless you have made mistake.
Flush coco by cutting nutrients to in my case 25% for one day in my case I can see them reaching and 50% then full strength. I do it twice during veg and once the second week of bloom. That is when I switch mixtures to my bloom mix. Is same as veg and is very close to 3-2-1 but in bloom I use
moab and backstrap and jacks a 40% some say 50% but it will burn the tips of the leaves. Choose your media if coco is it. Think: you use coco because is a fluffy mixture that the water passes thru why would you start with a brick get a bag of good stuff.
Capulator has switch me to drip to drain with his posts and is great. The reciruation blues are not for me I use about 8 to 10 gallons a day and send it to my garden and fruit trees.