Reverse Osmosis
Every reverse osmosis unit has a membrane. The reverse osmosis membrane is which is semi-permeable, can be degraded by chlorine. Chlorine must be removed from the water using a carbon filter.
A sediment pre-filter cartridge filter can be used to protect the carbon filter.
3 filter components complete the 3 stages required for all reverse osmosis systems.
1, 2, 3 and 4 Stage Filtration
Stage 1
A sediment filter to remove particulate matter like dirt, silt and rust, which will affect the taste & appearance of your water. Also protects the carbon filter.
Stage 2
Carbon filter with activated carbon to remove chlorine or chloramines & condition the water prior to the reverse osmosis membrane. Also protects RO membrane.
Stage 3
Reverse Osmosis Membrane to remove organic & inorganic compounds such as fluoride & reduces impurities known as ' total dissolved solids (TDS) ' from the water down to 1/10,000 (0.0001) of a micron, reducing arsenic, lead, parasitic cysts, copper & more.
Stage 4
Colour changing resin - deionization filter can be used to remove all remaining total dissolved solids (TDS) from the membrane filtered water.
After the water is filtered by the membrane, there is usually a small amount of total dissolved solids (TDS) left in the water.
In aquarium water applications it is important to remove the remaining TDS from the water.
Hence filtering the water through a resin that is charged with cation and anion resins (H+ and OH-). As the resin absorbs the TDS, it will change colour from blue to amber as it becomes exhausted.
When all resin has changed colour, it is time to replace the DI filter.
Acting as visual prompt when to change the media.