When I first tested my plane old tap water its EC was 1.2 I added Ionic Boost 4-5 ml per gal and Bloom 8-10 ml per Gal. the meter said 3.8 it was a the top. so i just added my tap water until it was around 2 or 2.2.
My Pal uses twice as much bloom as boost. Thats why I used that 2/1 ratio...