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Old 12-15-2012, 03:26 PM   #1
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RO/DI System

Hey fellow reefers,

I have a couple of questions about RO/DI systems. I have a 90 gallon tank. I was told by my LFS guy that if I did do this get an RO/DI unit. So I would like some guidance from the experienced Aquarium Advice community on purchasing one of these.
What does the DI stand for?
How many gpd will work for this size aquarium?
Where is a good place to buy a good system?
Thanks

mardaman
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Old 12-15-2012, 03:54 PM   #2
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That's wonderful that your lfs actually recommended one instead of saying buy our water lol. A great place to get one is bulkreefsupply.com especially during one of AAs group buys. Di stands for de-ionization. Good gpd is the 75 but the 150 upgrade reduces waste water and obviously doubles your output.
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Old 12-15-2012, 04:12 PM   #3
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I know he is awesome. Thanks for the info
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Old 12-15-2012, 10:59 PM   #4
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I got mine off eBay from aquasafecanada.com

Came with 5 sets if filters and 2 ro membrains
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Old 12-16-2012, 02:02 AM   #5
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Quote:
Originally Posted by Mrc8858 View Post
That's wonderful that your lfs actually recommended one instead of saying buy our water lol. A great place to get one is bulkreefsupply.com especially during one of AAs group buys. Di stands for de-ionization. Good gpd is the 75 but the 150 upgrade reduces waste water and obviously doubles your output.
So the more gpd you have on a system the less waste water it makes? I want one but can't really deal with a whole heap of waste water.
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Old 12-16-2012, 02:31 AM   #6
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The more gpd only tells you how much clean water your unit can make in a day, I don't believe it says anything on the ratio of waste to clean water.

+1 to aquasafecanada even though my unit is around 6 years old
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Old 12-16-2012, 08:25 AM   #7
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also look at The Filter Guys http://thefilterguys.biz
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Old 12-16-2012, 08:38 AM   #8
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Originally Posted by Sterling_salt View Post
The more gpd only tells you how much clean water your unit can make in a day, I don't believe it says anything on the ratio of waste to clean water.

+1 to aquasafecanada even though my unit is around 6 years old
The 150 gpd upgrade is a second RO membrane which will reduce your waste water by almost half which will be around 1/2 ratio (product/waste) with the upgrade.
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Old 12-16-2012, 08:54 AM   #9
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Quote:
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So the more gpd you have on a system the less waste water it makes? I want one but can't really deal with a whole heap of waste water.
You run the waste water in your washing machine or out in yard to water grass or flowers.
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Old 12-16-2012, 09:02 AM   #10
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You run the waste water in your washing machine or out in yard to water grass or flowers.
Plants love it!! Potted ones especially
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