advise on ro filters

im looking at getting a ro filter..have seen ones on ebay there is a 5 stage and its cheaper than the 4 stage at the shops..am i better off getting one from the shop..cheers greg

i got mine from ebay. it works well. the trick is to make sure that it takes the standard catridges that you can get from bunnings or your local fish shop. I would also recommend only going 3 or 4 stage. 5 stage will be way too pure and you will have to add stuff back into the water. I have a 4 stage on adelaide tapwater, known through-out the world as horrid (serriously, international ships will not refil their freshwater tanks here :O), and i have to mix some tap water back through to bring it up to suitable.

thanks doug, another question did yours need to be installed or did you get one(or is there one) that can connect to a hose? most of the ones ive seen need instalation
cheers greg