Hey, so this is how I water my marijuana plants that are growing in coco. You want to water everyday, unlike soil because coco is a hydroponics media.

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Their are a few reasons for this.

1. Coco holds 30% oxygen when fully saturated.
2. If you let coco dry out, you will get lower yields and most likely nutrient issues because when the coco dries out, it leaves dry spots, where the roots dry up and die. That causes issues.
3. When you water every day or twice a day or ever three times a day, you are replacing all the oxygen the plant used up, thus letting it grow faster. You are also replacing any nutrients the plant used up with fresh nutrients. This is why I water every day with nutrients.
4. You get hydroponic results. Fast growth. Bigger yields.

Yes, this is part of the course on how I grow marijuana in coco.