Reverse osmosis purifies tap-water to remove such contaminants. It relies on extremely fine membranes, made from Thin Film Composite (TFC) materials to strain unwanted dissolved chemicals, including nitrates, phosphates and heavy metals such as copper, leaving only water (RO Water)
This needs to happen under pressure, against the osmotic gradient of the water — hence ‘reverse’ osmosis.
Normally, water would pass across a membrane from low to high solute concentration but, in the case of reverse osmosis, the opposite happens.
The purified (or ‘product’ or RO Water) water can then be used in the aquarium, while the waste water, which has concentrated the contaminants, can be discarded or used for your garden plants.
Our tap-water is subject to strict quality guidelines but, even so, contains substances our aquarium’s inhabitants wouldn’t like. Tap-water quality and chemistry varies tremendously from region to region, but we’ll often find harmful nitrates originating from agricultural run-off.
UK tap-water is legally allowed to contain 50 mg/l nitrate. Phosphates and silicates may also be present which also act as algal fertilisers promoting nuisance algae. Other chemicals may be present, including heavy metals, which won’t be appreciated by sensitive marine invertebrates.
Although RO Water is ideal for expert aquarists keeping delicate species, it is equally suitable for the average community tank – especially in areas where tap water contains high levels of nitrate or phosphate.
As RO Water is so low in essential minerals, it is normally necessary to add buffering products to prevent problems with pH. Different buffers are available for freshwater or marine use and should be added before using the water in your aquarium.
|SG:||1.024 to 1.026|
The price is excluding the jerrycan itself. The jerrycans may be purchased separately.