Aquaponics mimics natural eco systems. The fish feed the plants and the plants clean the water for the fish. The mason jar aquaponics is a great little introduction project to the world of aquaponics. Please follow the instructions careful, and do research online on how to best take care of your betta fish.
Now there is a lot of debate about what size tank is suitable for betta fish, I’m not going to enter the debate and I will leave it up to you to make the right decision.
Please remember to check the quality of the water and do partial water changes when necessary.
Another pro tip, is to check the gravel with vinegar, if you see a reaction do not use this gravel as it will mess up the ph balance in your tank.
Any questions, just ask below.