Plant Magic range.
Grow, bloom, PK booster, catalyst, a seaweed extract. magnesium and root stimulant. Not all at once mind.
EC of tap water is 0.345 or something similar, around that.
I don't mix in batches as they don't seem to need feeding all at once.
About same as my tap water. One sure fire way of course to see if they're over watered is to let them dry out wishing u luck the rest of the way