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True Living Organics - The Ultimate Guide to Growing All-Natural Marijuana Indoors (2012)

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filtering is likely much easier and cheaper than you anticipate it will be. A counter<strong>to</strong>p reverse<br />

osmosis filtering unit (R/O filter) comes with 3 filtering chambers. Two are used for carbon filters,<br />

and one is the actual reverse osmosis membrane that removes dissolved salts/solids. First the water<br />

hits the pre (carbon) filter, then the R/O membrane, then the post (carbon) filter and mine makes about<br />

2.5 gallons per hour. I get my filters from Pure Water Products, and these guys will set you up with a<br />

garden hose attachment free for the asking. I use their “Style A” counter<strong>to</strong>p R/O Filter. I replace the<br />

pre filter once every 6 months, and the post filter once per year. <strong>The</strong> R/O membrane filter lasts for 3<br />

years or so.<br />

This carbon filtering unit removes chloramine among other things<br />

REV’S TIP<br />

Here’s the link <strong>to</strong> Pure Water Products’ website: their shipping is free in<br />

the USA: http://www.pwgazette.com/ I use the Style A counter<strong>to</strong>p<br />

Reverse Osmosis Machine, with a free garden hose attachment. I also use their carbon filters,<br />

which are designed <strong>to</strong> remove chlorine/chloramine from 20,000 gallons of water, and they’re<br />

about $20.00 USD each.<br />

Here are a few great tips about using reverse osmosis units in order <strong>to</strong> get the most out of them for<br />

the longest time. First, get a TDS meter <strong>to</strong> see when you actually need <strong>to</strong> change your R/O membrane.<br />

Also see “Softened Water” in the Troubleshooting section of this book. I would also always<br />

recommend using some kind of sediment filter before the R/O unit. If your water is “hard” and above,

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