1. Get materials A pair of scissors, a piece of gauze, a pile of fine sand, charcoal, an empty plastic bottle, some gravel, a water container (cup), a piece of string, etc.
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2. Subtract the bottom of the empty plastic bottle with scissors in the production process, and drill a number of small holes on the plastic bottle cap (generally 7 to 10 are enough); Cut clean gauze into a square shape (about 3 to 4 pieces on top of each other), place it flat in the bottle cap, and close the lid tightly; Grind the charcoal with crushed stone to make a powder, then put 3~5cm thick fine sand, charcoal, fine sand, charcoal, fine sand...... (About 5 to 7 floors). So a simple water filter is done.
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3. Check the experiment to take unclean water, such as toothpaste water, foot water, face water...... Slowly put it into a homemade simple water filter, fix it with a rope in a place such as a tree trunk that is not easy to shake, put a cup below, leave it for a night, and see if the water is clear the next morning, judge whether the filter is successful according to the cleanliness of the water, and determine which places need to be modified.
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4. The disinfection process can be carried with medical iodine instead of water purification tablets to disinfect the water. In purified water, add 3-4 drops of iodine to every liter of water, and double the amount if the water is cloudy. After stirring and shaking, the standing time should also be longer, 20 to 30 minutes later, you can drink or reserve.
Prepare a storage box size, according to the fish tank, drill holes in the side with an electric drill, put the bottle on the side of the box drilled, put the filter material inside the box, smooth the top, and then take two bottles of small storage boxes, spread a layer of filter cotton inside, as the impurities of the secondary filter water, homemade fish tank filter box is done.
The specific method of self-made filter box is as follows:
1, Prepare materials: plastic bottles, pebbles, fine sand, cotton, scissors, straws, activated carbon.
2, subtract the bottom of the bottle, and drill a hole in the lid, the size of the hole matches the size of the straw, complete the backup.
3. Fill the bottle with fine sand, pebbles and cotton in order. This is the method of self-made pure water filter, you can understand.