Mold/algae in my water cooler???

It is the presence of light that activates the growth of this stuff. It is not bacteria but a form of algae, same as you get in fish tanks, if you have noticed this. Can't be avoided. But it's easy to clean and sanitizes at the same time. Just add some bleach ( a cup or so should be sufficient) to a full jug of water (tap water) and let it sit till the green stuff is gone. Rinse throughly and reuse. Be sure that the water is not hot as this will cause the chlorine to dissipate as escaping gas.

Mold In Water Cooler

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yeh thats a well known fact but many choose not to believe it! There are several things that help the hot pail freeze faster than the cold pail. Here are what is thought to be the most significant factors: Layer of ice forms on the top of the cold water. The hot water is more likely to be supercooled. This means that the hot water's temperature is more likely to cool to temperatures below zero degrees Celsius. In the cold non-supercooled water, ice crystals form and float to the top, forming a sheet of ice over the top of the water, creating an insulating layer between the cooler air and the water. This ice sheet also stops evaporation. In the hot water that has become supercooled (thus, no longer hot) the water, when it does freeze, freezes throughout, creating more or less of a slush before freezing solid. Why is hot water more likely to be supercooled? Because hot water is less likely to contain tiny gas bubbles. Gas bubbles form from dissolved gasses as the water cools. When the hot water was heated, these dissolved gasses may have been driven out. In cold water, ice crystals use the tiny bubbles as starting points for formation (in physics, we call them nucleation points). But in the hot water, there are no bubbles, so there aren't as many starting points for the ice crystals. Dissolved gasses also lower the freezing point. Since heated gas is less likely to contain dissolved gasses, it's more likely to freeze first. Water in the hot water pail evaporates at a much faster rate than the cold water. This does two things. First, the process of evaporation is endothermic, which means it takes energy for something to evaporate. As a molecule of water evaporates, it leaves the surface of the water and flies into the atmosphere. Thus, in simplified terms, the molecule converted heat energy into kinetic energy (energy of motion). Since the hot water evaporates quicker than the cold water, it loses heat energy quicker than the cold energy. Second, since some of the hot water evaporates away, there is less water left to have to freeze. The hot water pail will melt the surrounding snow. Later, as it begins to freeze, the snow around the pail will freeze back so that it more closely "touches" the pail. The cold water pail is then only sitting in fluffy airy snow, while the hot water pail is in a form fitting ice-crust. The ice-crust will obviously conduct the cold better that the airy snow. Other factors, such as convection currents (the movement made as hot water rises while cool water sinks) may or may not play a role in this odd phenomenon.

When you expose the sealed bottle to air bacteria will start to grow every time. I would use a different bottle. But if you must clean it use bleach and water. When they place the water in the bottle they ozonate it (air) and it disipates in about thiry seconds. That's why sealed bottles are sanitized.

Try using Vital Oxide to clean out and disinfect the cooler.