Can you grow marijauna hydroponically in an aquarium with no harm to the fish?

we have a hydroponic system at the green house in the Lake metroparks, that is runn using just fish tank water. we do not add any nutrients to the water. as this would harm the fish, however that being said, we also do not keep the "tank" as clean as you would an aquarium. there is a lot a algae. we are growing several orchids, a pitcher plant, and a bunch of other house plants on this system and they are fine. the plants are not actually in the tank however. they are in trays that drain back to the tank and there is a drip irrigation tube to each plant which is hooked to a larger line on a submersible pump. we have tried "harvestible" plants on this system and there is not a high enough out put of nutrients from the fish to keep the "harvestible" plants healthy, (we have tried, tomatoes, cucumbers, lettuce, cabbage, corn and several herbs) if you are interested in hydroponics check out "crop king" they are the company that the park uses to get there supplies from.

Cannabis is a terrestrial plant and few terrestrial plants have the ability to grow submerged...their anatomy does not allow for oxygen circulation within the plant.

Yes you can cultivate the plant you want by ‘Hydroponics’ method. But where do fish come in the picture ? Perhaps you have rather confused notion of hydroponics. Let me clear it. In this method almost any land plant can be cultivated. Some grow much better this way. First of all containers are filled with inert supporting material such as clean sand , gravel or vermiculite . The last one is the best or widely used.( Vermiculite is a natural, non toxic mineral which expands with the application of heat. The expansion process is called exfoliation and it is routinely accomplished in purpose-designed commercial furnaces. It is used as growing medium for hydroponics. ) Plants are sowed in these containers or ready young seedlings are planted in them. Now comes the crucial part. Since the soil or the medium is not giving them water and nutrients ; they are to be supplied by you. They are to be supplied in very carefully measured quantity And through water only. You will notice only the root portion remains in the medium and the rest of the plant is in the air like any normal plant. Fish has no room in it. Kindly click on the links below to see Tomato growing by this method. http://www.casa-guatemala.org/photos/mappics/m20.jpg http://www.oardc.ohio-state.edu/hydroponics/ABE/PhotoAlbum/images/web/hydroponic%20tomato%20plants_600x450.jpg http://www.parsource.com/images/jack.JPG Lastly Hydroponics and aquarium , two in one is just not possible.

High concentrations of NPK that would optimize the plant growth would not be good for the fish and the effect of the roots on the fish could be an issue depending on the ratio of roots to water. Plants give off many natural products and organic compounds from the roots - high levels of such plant secretions would not be great for the fish either. Also, some fish would eat the plant roots if the conditions were such that the fish could live okay. So, if you got busted for growing pot you would also potentially do time for cruelty to the fish! By the way, plants need more than NPK to live. The macronutrients are given by: C HOPKNS CaFe Mg (remember it as "C Hopkins cafe 'mighty good'" - Carbon, Hydrogen, Oxygen, Phosphorus, Potassium, Nitrogen, Sulfur, Calcium, Iron, Magnesium). They also require trace levels of boron, manganese, copper, chloride, molybdenum and zinc. Most of these others will be in the fish food, however.....