Law, u talking abt mixing the salt b4 setup or after setup? got difference leh... using RO can reduce the amount of harmful particles b4 hitting the tank.. however, i never use it.. a bit costly for me.. i can use the $$ for other stuff... go simple.. if not, u will find that it is very expensive... initial startup .. no need..
Let us work together to preserve the world for our children to inherit by being responsible to our surroundings. Take nothing but pictures, leave nothing but footprints, bubbles and memories.
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