Canna makes a fine coco. I have used Dutchmaster coco and while it looked the same, I found the quality of manufacture lacking. Big chunks of pith and plastic. None of that in Canna.
Another thing about coco is you can reuse it. After harvest, I wait until the coco dries out, then shake the root ball over a strainer to get the hydrotron and big roots out. Then that is put into a rubbermaid container, and 1 gallon of water mixed with Canna's Cannazym is added @ 3x the recommended rate. The lid is sealed for a couple of days, and then cracked to allow air in. It is amazing how that eats those little roots up. After a few weeks it is ready to go. I have reused coco 4x now.
I really like this medium.
My tips:
CalMg @ 3 ml per gal every watering (including flush), smaller containers and water every day, PH to 6.0.
Good luck future coco-nut.;)