Can I Use Rainwater to Generate Reverse Osmosis Water for Fish?
I currently use half Reverse Osmosis (RO) water, half tap water & dechlorinator for my aquariums (probably closer to 75/25) but it takes a lot of water to generate enough RO to do water changes every week. For each unit of RO I create, I throw away at least 2 units. I know that I could use it for other purposes (such as water plants etc) but I still have to pay for that water.
I live in the UK so there's no shortage of rainwater falling out of the sky. As I am removing the total dissolved solids and, I think, the bacteria, there should be no reason that I cannot generate RO water with rainwater that I can see.
Can I safely make RO water using rainwater as the input and is my reasoning above correct?
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It all depends on your pre filters too.
My RO/DI unit has a sediment filter -> carbon filter -> RO membrane -> DI resins.
If you have the carbon filter you should be ok filtering rain water through your RO unit.
Also keep in mind Ro filtering works if you have proper pressure: 60 PSI is best.
So you will need a booster pump for it.
This article might shed some more light on the bacteria removal (paragraph 5): www.purewaterproducts.com/articles/carbon
Seems between carbon and the RO membrane you should be fine.
This seems like a good choice: www.bulkreefsupply.com/brs-universal-carbon-block-filter-1-micron.html
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