I'm a Canna convert. It is my #1 top choice for a hydro beginner nute system. I have run it both with and without meters, because I am lucky to have city water that complements it perfectly.
My background:
My city water comes in just below 200ppm and when the Canna Aqua AB is added at equal proportions up to about 1600ppm the pH goes BAM right to 5.8.

My setup:
E&F Hydroton containerized in quart pots, pre soaked to 6.0 before use!!!
2- 2x4 tables, each on 25gal res
Flood 15 min 6x/day in both day and night
CO2 injection but not to 'enrichment' levels
2k HPS (hortilux) air-cooled
6" vortex cooling room THROUGH the hoods
City water
Add CalMAg to 200-250ppm
Add Canna Aqua A+B
Add any supplements desired
pH to 5.8
1/2 cup cannazym per res

I run multiple strains per table and run my tables as a modified perpetual harvest so there is no 'schedule' per se.

One table runs at 1200-1400 with only CalMag and Canna Aqua Flores AB.

The other table runs at CalMag to 250, Canna Aqua Flores to 1400, GroTek Heavy Bloom and Bloom Fuel to 1800, Sweet at ~1 cup to the whole res.

Plants showing hunger move to stiffer feeding table. Plants just going into the system or near harvest go to lighter nute strength table. This is not ideal, but it is hwo I manage to run up to 38 different strains simultaneously.
All other supplements such as SnowStorm and Silica Blast are given as a foliar feed.

Good luck, it's great stuff.