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Reverse Osmosis Water


kiwis

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I'm in Auckland and researching my first RO kit. Given I'm on Auckland City mains water supply. What would I need in my RO kit? 3 stage 4 tage, 5 stage etc... I've seen a cheap one online but been told it wouldn't be worth it given it's 3 stages. 

No idea if Auckland use Chloramines either... assume they do.

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You ideally want 1-2 pre filters, a reverse Osmosis unit followed by De-ionising unit. 

You can get really cheap units with all of that but not all De-ionising resins are the same. Most stock standard ones sold in NZ are just a mixed bed resin but not designed specifically for NZ water. What i have found is NZ water is extremely high in silicate which will get through a De-ionising cartridge faster than other things and being silicate you wont pick it up with a TDS meter. 

Personally I have got De-ionising resins from america for my unit but its extremely expensive - it really just depends on your budget. A basic unit is still going to better than no unit. 

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It will be fine, and if you decided to upgrade in the future you can always by individual filter housings and add on to it. For someone starting out that's a great way to do it without making huge up front financial commitments. 

 

I Run two DI Membranes on my unit now each membrane cost around $90 NZD each plus housings on top of that. Silicates can feed algae in a tank so if you are finding after 6-12 months you cant seem to get on top of the algae then i would be looking at doing something similar and adding a couple of DI membranes to what you have. Some sponges also feed on silicates so some people hit it lucky and have a sponge explosion in their tank that helps absorb the silicates. 

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