With reverse osmosis (RO),
even the smallest of particles can be removed from the water supply,
thus keeping it clean and free of potentially hazardous
microorganisms. This concept is often used in commercial and
industrial applications to provide potable water, but many households
also make use of this technology. Your aquarium itself might have one
equipped.
Aquarium Water
Chances are, if you leave
your aquarium alone for a few days without cleaning it, the water
will get so polluted that the fish might end up suffocating and
dying. Even if you replace it with tap water, you’ll only add
minerals like nitrates, phosphates and chlorine, as well as other
heavy metals, which can all be highly toxic to invertebrates.
Essential Minerals
RO machines may be effective
in removing impurities, but this also means that all the essential
minerals that your aquarium life needs also get sifted away. So in
some cases, you’ll need to add these back into the tank—before
you do though, check with your RO filter’s manufacturer on the
minerals that get filtered out by the system. Some marine salt mixes
that you buy for your aquarium have some of these mineral components
added in.
Signs of Purity
So how do you know when the
water in your aquarium is pure after running it through the RO
system? For one, the pH should remain at a steady level, and the
phosphate and nitrate levels are low. Also, there should be little to
no algae growth.
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