What RODI system should I buy?
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BkReefBaby
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im on the same boat as you i have aqualife RO buddie 50gpd and it takes like 10 hrs to fill a 5 gallon bucket it sucks....i need something faster
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DiverGirl82
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I'm a newbie but I found this on Amazon. It seems to have pretty good reviews. I'm thinking this is the one I'm going to order.
0PPM Portable 150 GPD Reverse Osmosis RO+DI Filtration POQ-4B-150 https://www.amazon.com/dp/B00FAYBVB8/ref=cm_sw_r_awd_-A2FvbAFDZWS9
https://www.amazon.com/dp/B00FAYBVB8/ref=cm_sw_r_awd_-A2FvbAFDZWS9
0PPM Portable 150 GPD Reverse Osmosis RO+DI Filtration POQ-4B-150 https://www.amazon.com/dp/B00FAYBVB8/ref=cm_sw_r_awd_-A2FvbAFDZWS9
https://www.amazon.com/dp/B00FAYBVB8/ref=cm_sw_r_awd_-A2FvbAFDZWS9
The Spectrapure $125 refurbished system is very if not impossible to beat. Also right now they have their chloramine system on special and it is a lot of system for the price.
That is the one I got after you suggested it, so far its been a great system and was super easy to start up. I highly recommend it!
BlackShark087
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None compares to Spectrapure.
gtbarsi
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Here are the main considerations
1. How much water do you need to make on a regular basis and how long are you willing to wait for it?
2. Where does your source water come from?
2.1 If it is from town / city do you know if it contains chlorine, or chloramines? If you are not 100% sure there is a test kit you should buy to verify before deciding or your RO/DI system.
3. What is the water pressure in your house?
From this information the proper RO/DI system can be recommended. No doubt that Spectrapure products are awesome, but you want to make sure you get one that meets your needs. Also there may be some accessories that you will need / want and that should be factored in. BRS makes some decent RO/DI solutions as well. Their RO membranes are not rated as high and do not have the same rejection ratios, but they have really well documented Carbon blocks if you have to deal with chlorine or chloramines. I wish Spectrapure had similar information published in a easy to understand way.
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1. There are no advantages to a 25 or 50 GPD system. The main disadvantage is it takes 2 to 4 times longer to make the same amount of treated water as a 75 or 90 GPD RO membrane so don't buy anything but a Dow Filmtec 75 GPD, GE Water 100 GPD (basically the same as the Dow 75 but rated differently) or the Spectrapure 90 GPD which starts out life as a Dow 75 but is specially treated to improve its performance.
2. The source really does not matter to the RO system as long as you have 40 psi minimum and softened water is better for the membrane than hard water but either treats fine. The difference is soft water will make the membrane last longer for a lower cost of ownership.
2.1 Chlorine or chloramines, it makes no difference as long as you use a single high quality low micron extruded carbon block. There are no advantages to so called chloramine carbons and some of the tests lately have been bogus and skewed. The EPA MRDL or maximum residual disinfectant level for chloramines or chlorine either one is 4 ppm or mg/L and a good carbon removes the chlorine portion and breaks down the bond with the ammonia which is removed by the DI, not the carbon as some try to make you believe. In truth the DI is the most important part not the carbon.
3. As mentioned in 2 above, 40 psi is the bare minimum to operate a RO membrane but 60-80 or higher is even better as the higher the pressure the more efficient the membrane becomes. I run 95-100 psi at 99.43% rejection rate myself.
Spectrapure has more information here than you may want to read but everything is there:
http://spectrapure.com/frequently-asked-questions
"Things you need to know before purchasing your system" covers most of it:
http://spectrapure.com/Reverse-Osmosis-General-Info
Besides that, they have every possible hook up configuration you could imagine:
http://spectrapure.com/hookup-diagrams
and manuals for all their products:
http://spectrapure.com/Product-Manuals
and a good educational section on how RO systems work and more:
http://spectrapure.com/technical-info
and even videos is you want those:
http://spectrapure.com/Videos
and here is an old thread on chloramines that still applies today:
http://www.reefcentral.com/forums/showthread.php?t=1735402
and another:
http://reefkeeping.com/issues/2003-11/rhf/feature/index.htm
Chloramines are well understood and not the problem many try to make you believe. A good carbon and better DI with good contact time is all it takes, not catalytic carbons designed for industrial applications with high levels of chloramine way above the EPA allowable level
They have not been the leader in the industry since 1985 for no reason at all, that 30 years of satisfied customers. Their basic $125 refurbished RO/DI blows most other systems away but you can always go more expensive if you are looking to extend filter and resin changes. If you are confused call them, they would be glad to explain the different systems.
2. The source really does not matter to the RO system as long as you have 40 psi minimum and softened water is better for the membrane than hard water but either treats fine. The difference is soft water will make the membrane last longer for a lower cost of ownership.
2.1 Chlorine or chloramines, it makes no difference as long as you use a single high quality low micron extruded carbon block. There are no advantages to so called chloramine carbons and some of the tests lately have been bogus and skewed. The EPA MRDL or maximum residual disinfectant level for chloramines or chlorine either one is 4 ppm or mg/L and a good carbon removes the chlorine portion and breaks down the bond with the ammonia which is removed by the DI, not the carbon as some try to make you believe. In truth the DI is the most important part not the carbon.
3. As mentioned in 2 above, 40 psi is the bare minimum to operate a RO membrane but 60-80 or higher is even better as the higher the pressure the more efficient the membrane becomes. I run 95-100 psi at 99.43% rejection rate myself.
Spectrapure has more information here than you may want to read but everything is there:
http://spectrapure.com/frequently-asked-questions
"Things you need to know before purchasing your system" covers most of it:
http://spectrapure.com/Reverse-Osmosis-General-Info
Besides that, they have every possible hook up configuration you could imagine:
http://spectrapure.com/hookup-diagrams
and manuals for all their products:
http://spectrapure.com/Product-Manuals
and a good educational section on how RO systems work and more:
http://spectrapure.com/technical-info
and even videos is you want those:
http://spectrapure.com/Videos
and here is an old thread on chloramines that still applies today:
http://www.reefcentral.com/forums/showthread.php?t=1735402
and another:
http://reefkeeping.com/issues/2003-11/rhf/feature/index.htm
Chloramines are well understood and not the problem many try to make you believe. A good carbon and better DI with good contact time is all it takes, not catalytic carbons designed for industrial applications with high levels of chloramine way above the EPA allowable level
They have not been the leader in the industry since 1985 for no reason at all, that 30 years of satisfied customers. Their basic $125 refurbished RO/DI blows most other systems away but you can always go more expensive if you are looking to extend filter and resin changes. If you are confused call them, they would be glad to explain the different systems.
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AllSignsPointToFish
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I've been looking at this system as well. Can you tell me if you have to purchase standalone replacement DI cartridges or if they are refillable with bulk DI resin? I was unable to tell from the Amazon listing.
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