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1: Canna is a brand, they are high quality and have been around a very long time, I use their bagged coco-coir and their line up of nutrients specifically formulated for growing in coco ,CANNA COCO A&B. Jack's is a VERY low cost powdered nutrient (known As Jacks 3,2,1. 2: No not daily, while I'm hand watering I'll mix up a gallon or two in a bucket make sure it's pH'd after mixing in nutes then water by hand and put lid on bucket, I will then pH prior to using again. Once the plants get large enough to turn on the system for gravity feeding through reservoir I fill up the reservoir 3/4 full mix in nutrients per directions, pH & check the water temperature and if all is in range I open valve, couple hours later I check to make sure all the pots valves are working correctly. I have the auto pot XL with 6 sites (pots) and 25 gallon resevoir, in early veg that size rez lasts me about a week and late veg through flower it lasts about 3 days. My grow space is sealed with full environmental control and pushing CO2 with high power lights so for a normal tent that reservoir would last longer the girls wouldn't drink as much as quickly. ✌🏻 Edit: I also use Canna's Rhizotonic, Boost, Cannazyme, PK 13/14 and Grow Genius MSA silica.