A fish tank, how big the tank is depends on how big your room is and how much space you have allocated to your set up. The important thing is that you do not add any fish to the tank until it has been up and running for at least three weeks to allow the natural bacteria to grow.
Fish tank - This is very just like simple aquarium system and the only condition that applies to this component is that it must be big enough that fish can move and swim around easily.
One of the great advantages of aquaponics diy over traditional gardening is you don't have to work on your hands and knees or bend over to work with your plants. That is if you locate your planting beds at waist level. So choose a comfortable level to place your growing beds.
If you don't want to eat your fish, a lot of people just keep them as decoration or to breed and sell to aquarium owners, aquaculturists, or for stocking fish ponds.
Aquaponics is simple and a more practical way of farming for most people. With typical farming, you would need a large tract of fertile land. But with aquaponics, there is no soil required and you can grow a lot in a very small space. You also eliminate the labor and cost involved with tilling the soil, fertilizing and working the land.
The most important factors when it comes to choosing fish species are these: Nutrition, spawning, density in a container. Catfish are perfect for large containers, and they eat almost everything. Other good choices of fish are Carp, goldfish, jade perch and cod. In practice all the different species can work, but you may experience problems with some of them, especially when it comes to propagation and spawning. If that is not a concern, by all means get the cheapest fish you can find.
A garage or even a spare room in your home can be a great place to get started. No need to rent an industrial space to get started. You can get started in front of a sunny window or a small greenhouse in your back yard. If you don't have access to these things, artificial grow lights will work, although they add to the cost.
Once the ammonia has been decomposed by the bacteria, nitrates are then produced. Nitrates are considered byproducts which occur naturally in aquatic systems. Nitrates are good in small amounts but they can harm the biological system because it will encourage unwanted vegetation to grow.
We just keep replenishing the water and nutrients and there you go. That's the concept anyway, it's a little more difficult to do in practice, but not by much. There's kits you can buy, plans you can buy, and of course pre-built systems.