RO Units effectively strip your water of all the minerals and nasties that can cause havoc with your tank, leaving you with clean aquarium safe water.
Remineralising additives help put a little of the good stuff back into the water that was loss during reverse osmosis.
API Electro-Right Water Conditioner helps to add essential mineral elements and electrolytes to water which has been through. It is specially designed to be used in freshwater tropical aquariums.
Caribsea Pure Sea Water is exactly what it says on the tin - real and pure sea water which contains all the major and minor trace elements found in natural seawater. So there is no need to worry about harmful pathogens as this is completely natural and beneficial for the health of your fish tank.