All aquariums necessarily need filtering. The waste products of its inhabitants, the smallest particles of dirt, as well as other organics, tend to decompose, releasing ammonia, which is very harmful for fish. To avoid this unpleasant poisoning, it is necessary to activate the processes that turn harmful substances into nitrates.
Aquarium biofiltration is the process of converting ammonia into nitrites and then into nitrates. It takes place with the help of beneficial bacteria in the aquarium and is dependent on the absorption of oxygen. In an aquarium it is very important to maintain a constant flow of water that will be enriched with oxygen. This is achieved by using a filter in the aquarium.
External filter for aquarium do it yourself
To make a biofilter, you must get the following materials:
- Plastic half-liter water bottle
- A plastic tube with the same diameter as the inner diameter of the neck of the bottle itself.
- A small piece of syntipon;
- Compressor with hose;
- Pebbles with a fraction of not more than five millimeters.
The bottle should be carefully cut into a couple of pieces. Keep in mind that one of them should be more. This is necessary in order to get a big bottom and a small bowl with a neck. The bowl should be directed throat up and tightly planted in the bottom. On the outer circumference of the bowl we make several holes through which water will flow into the filter. It is better that these holes have a diameter of three to four millimeters, arranged in two rows, four to six in each.
The tube is inserted into the neck bowls in such a way that came with a little effort. After this, there should be no gaps between the neck and the pipe itself. The length of the tube is chosen in such a way that it protrudes several centimeters above the structure. It should not rest against the bottom of the bottle.
Otherwise, the water supply to it will be difficult. With our own hands, above the bowl, we will fall asleep a layer of gravel six centimeters and cover everything with padding polyester. Install and fix the aerator hose into the tube. After the construction is ready, it will be placed in the aquarium, the compressor will be turned on so that the filter can start its work. In the working device, beneficial bacteria will begin to appear, which will decompose the ammonia formed into nitrates, creating a favorable environment in the aquarium.
How does a homemade external filter work
This design is based on airlift. Air bubbles from the compressor begin to rise into the tube, from there they get up and pull with the flow of water from the filter. Fresh and oxygen-filled water penetrates the upper region of the glass and passes through a layer of gravel. After that, it passes through the holes in the bowl, moving down the tube, and flows into the aquarium itself. In all this design, the synthetic winterizer performs the function of a mechanical filter. It is needed in order to prevent possible flooding of the gravel.
The task of the external filter, made by hand, is mechanical as well as chemical cleaning water. This type of cleaner, most often, is installed on large tanks, whose volume is more than two hundred liters. In the event that the aquarium is too large, you may need several external filters. These devices are usually considered expensive, so you can try to do everything with your own hands. For an aquarium, this would be a good option.
Now you can run external cleaner, made by hand, and check how it works. You will see that with this device your aquarium will shine clean and the fish will always be healthy.