Inspired to build an aquaponics system for DIY gardening? What do you think you have to do on how to build an aquaponics system? While indoor or outdoor aquaponics, and shape of structure adjusted with availability of space and your intention to build aquaponic (fish for meal or decorative, herbs or vegetables), the most important material that you should consider is planting media that also become water filter.
Planting media become water filter device on aquaponic recirculation process, so water purified. As water filter, planting media absorb ammonia, nitrite, nitrate, and phosphorus. Those compounds make the water contaminated. For example, nitrites with high amount in water inhibit the ability of fish blood to bind oxygen. The impact, fish attacked methaemoglobin.
In aquaponics cultivation, choose planting media that has porosity element. Porous planting media become water filter and stream. There are organic and inorganic planting media. Organic media such as coco fiber liner, paddy/rice husk ash/ charcoals, wood sawdust, or dried fern roots that usually for orchid. Inorganic planting media such as perlite, pumice stone, rockwool, coral reef, and gravels.
Which one are the best planting media as well as water filter? Organic media easily covered with fungus, so you have to replace it routinely. Thus make expensive materials. Inorganic material durable, but heavy, so consider the aquaponics before you use it. From list above, the best planting media as well as water filter to build an aquaponics system is pumice stone. Why?
1. Pumice stone has pores more than others
2. Pumice stone has rough surface, and the surface wider so has the ability to absorb bacterial more than others
3. Pumice stone has the degree of acidity that is close to normal, soft texture, and crumbly, so pumice can sustain the adhesion of plant roots.
Next thing that you have to consider on how to build an aquaponics system is the composition between planting media and water. Ideally, planting media volume is 10% until 20% from aquarium water voume.