| Quantity | 500 ml (17 oz.) |
How infection risks develop in bubble columns:
1. Dust and other debris is drawn into the water in the tube via the air pump. Materials such as dirt, fibres from carpets and clothing and dead skin all harbour micro-organisms which contaminate the water.
2. Warmth, light and aeration in the water provide ideal conditions for microbial growth. Bacteria and algae multiply in the water and grow on the inner walls of the tube, forming slime. This slime provides an ideal environment for bacteria to grow and will spoil the visual effect of the tube.
3. The water used to fill the tube, or to 'top-up' during operation, may contain high counts of bacteria. Remember that tap water is not always sterile.
4. As the bubbles burst at the waters surface, they release a cloud of tiny water droplets (called aerosol) which are carried into the air around the tube. If the water is of poor quality, aerosols can spread harmful bacteria into the air and present a risk of infection.
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