It may be possible to simply supplement your tank with extra nutrients during the flowering stage, but it can be harmful to fish to add an excessive amount of extra nutrients unless the plants use most of it up before the water is re-circulated back to the rearing tank! Extra planning and water testing may be needed to manage which nutrients are currently available.
How to Produce the Nutrients Needed by Cannabis
Tactics for Growing Marijuana with Aquaponics
You feed the fish, they feed the cannabis!
The Rearing Tank / Aquarium is where the fish or other aquatic creatures live. These creatures produce waste containing nutrients that are vital for plant growth. Common fish used in aquaponics include tilapia, koi and goldfish, but there are many other hardy species that can adapt to an aquaponic environment including blue gill and catfish.
While “getting your feet wet” with aquaponics, don’t beat yourself up if you run into nutrient problems!
Although fish are the most common species used for aquaponics, other aquatic creatures like shrimp, crayfish or prawns can also be used. Both edible fish and ornamental fish can be used successfully in an aquaponic system. Generally you want to pick a species that is hardy and can tolerate crowding. Tilapia is an edible fish that adapt very well to aquaponics, and koi or goldfish are great choices for ornamental fish since they are nice to look at and can thrive in sub-optimal environments.
Most Marijuana plants are grown in soil, but there is another way… Agriculture of the future is using nutrients from fish to grow Marijuana.
Hydroponics + Aquaculture = Aquaponics
Good to know – The plants are not always on top of the fish tank, sometimes they are off to the side. In this case, the water flows from the fish tank to the plants and then gets pumped back to the tank as shown in the figure below.
How it works
In short, Aquaponics dramatically reduces the amount of water needed for raising fish, while producing high-nutrient plants at the same time! Seems like a great way to grow Marijuana to us.