Growing in coco is like regular hydroponics. You need to get the pH correct, and the feeding regime regular, which differs dramatically from growing in soil.
Most coco growers will feed the plants 2-3 times a day or drip feed, when lights are on in order to deliver the right about of nutrient to the root area. This is no different from those that flood and drain or many other types of hydroponic grows. Canna Coco A&B is loaded with nutrients and trace elements, calcium and even fulvic and humic acid. All you need to do is deliver enough of it to the roots of your plants.
The basic premise behind coco is that it is a light substrate, lighter than rockwool, except with coco there is more air available to roots, and coco does not hold much buffer of nutrient or water. So that means regular watering and also running the runoff which comes out of the bottom of the pots - to waste. It is important that you water in that manner, with run off and dump the run off due to how quickly salts can build up in the coco media. Many coco growers will set up automated watering systems that run multiple times per lights on period, that saves you having to manually be available every day to water your plants. This is no different to the way many hydro growers work their grows.
Coco is afterall a hydroponic substrate, it just looks kinda like soiless mix. So pretty much everything you learnt from soil growing has to be relearned with coco. Do not allow water to sit in the footers, let the run off run to waste. Water 2-3 times a day or drip feed, during veg, and more during flowering. Manage the pH and following the feeding levels on the bottle and let the coco itself determine how much of the nutrient it will retain in the coco substrate for the roots to eat. The pH needs to be 5.8 during veg and raise it to 6.0 to 6.2 during budding. I have not done much coco growing myself, but I am sure that there are hundreds of successful coco growers that frequent these forums who may be of better assistance to you on this matter.
