Do you ever wonder how people's aquarium or reef systems stay so
clean or at least much cleaner than your own? The main reason is because
most aquarium hobbyists use some type of reverse osmosis system to
obtain such a clean purified water. There are so many benefits to using reverse osmosis (ro) systems for your aquarium including less maintenance on cleaning tanks, less algae growth, and it's easier to pH balance the water.
Tap water more than often contains impurities that cause problems
when it is added to the aquarium. Most tap water contains phosphates,
nitrates, chlorine and heavy metals. Aquariums are sensitive to
phosphates and nitrates which encourage algae growth. Heavy metals like
copper are typically found in your tap water and is very toxic to
invertebrates. A reverse osmosis system will easily remove these
impurities to a very low level which is why they are so popular with
Typically most waters, especially well water, has a high hardness
level which makes it very difficult to pH calibrate. Hardness is
defined by having calcium and magnesium present in the water. pH
conditioners work best when the water source has very little hardness.
The more impurities in the water, the more pH conditioners you must use
in order to balance it correctly. However by using a ro system, it will
remove the hardness so that pH calibration will be less costly and much
For ultra pure water, you should combine any standard reverse osmosis water with a deionization (mixed bed di) filter.
A mixed bed DI filter will remove all the left over contaminants that a
reverse osmosis filter cannot remove which will leave virtually nothing
in the water. A combination of reverse osmosis and DI filters will
bring your water to a 99.9% purity.