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Tausey
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Joined: Aug 07, 2011
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Location: Pune
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 Posted: Mon Jan 30, 2012 3:55 am Post subject: RODI unit Help Needed... |
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Hi Guys,
I am interested in buying a rodi unit for my marine aqua but unble to get any info apart from kent, aquaguard and other local brands,which i am not too keen on buying. Can someone tell me where to get rodi unit and how much would it cost. I stay in Pune( Maharashtra)
Regards
Tauseef |
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Tausey
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Posts: 33
Location: Pune
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| Posted: Tue Jan 31, 2012 5:02 am Post subject: Re: RODI unit Help Needed... |
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Team,
Can someone help me in this as its really Urgent
Regards
Tauseef |
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yajur
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Joined: Feb 23, 2011
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Location: tamilnadu
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| Posted: Tue Jan 31, 2012 9:18 am Post subject: Re: RODI unit Help Needed... |
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| In India Ro unit is easy to source but DI unit is hard to get. |
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aquadip2000
Moderator - Sponsor's Forum
Joined: Jul 05, 2003
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Location: Bangalore, India
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| Posted: Tue Jan 31, 2012 9:46 am Post subject: Re: RODI unit Help Needed... |
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Hi Tauseef ,
We have an RO and DI Unit suitable for preparing water for Marine tank use.
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Tausey
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Location: Pune
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| Posted: Thu Feb 02, 2012 4:51 am Post subject: Re: RODI unit Help Needed... |
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Hey
Is is fine if i use domestic RO unit like aqua guard and kent to get water for my marine tank??
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Tauseef |
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josyjames
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Joined: Apr 21, 2010
Posts: 2500
Location: Bangalore-Ramamurthy Nagar
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| Posted: Thu Feb 02, 2012 11:07 am Post subject: Re: RODI unit Help Needed... |
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Yes. You can. There is no issue's in using the domestic RO unit for this purpose. All RO units functions on the same technology. Only the brand names differ.
There are other parameters that you need to think about when you are planning to use the Aqua Guard/Kent etc kind of system for the Aquarium.
Let me give a scenario:
The Aqua guard medium level model which comes in the market, hold 8 lts of purified water in its storage container. And it can purify xx amount of water per hr. Imagine your tank hold 100 lts of water and if you plan to use the entire water as RO water, then you need to store the RO water in a big container to add upto 100 lts. At a time, you get only 8 lts of RO water. So you will have to keep on storing the water to fill your aquarium.
Now there is a life time for the filter candles inside the RO unit. It say that we need to replace the candles every xxxx lts of water is purified. Typically it says that we need to change the candles every year depending on the consumption of the water. And the candle sets cost around 3.5K.
This says that if you are planning to use the domestic RO unit, you will end up in using the system more frequently and which in turn will make you to change the candles of the filter unit to be replaced very soon..
This is my perception. Lets experts comment more on this.
I would suggest to get the units separately and build the RO unit. You can all the units separately in the market. You get the micron filter candle, UV unit, Carbon filter unit, Pressure booster pump separately.. All you need is to find them where to get. See if the cost is lesser than the domestic unit and assemble it.
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aquadip2000
Moderator - Sponsor's Forum
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Location: Bangalore, India
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| Posted: Thu Feb 02, 2012 12:44 pm Post subject: Re: RODI unit Help Needed... |
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If i may say a few words with no offense to any product available in the market.
The process of RO is the same globally , but the devices are made to suit different industry needs.
A domestic RO unit available commercially is used mainly for drinking water application, the TDS if measured at the output is about 40 ppm. This TDS is required for all drinking water , as TDS of below 20 will essentially strip the water of all salts causing deficiencies in drinking water suitable for us.
If you have tried tasting the Water at TDS of 40 and zero one will be able to make out the stark difference. There is no taste at Zero TDS and you will not feel like drinking it.
For marine tanks , the salt which is commercially available is manufactured to be mixed at water which has a TDS of zero. If this water and good quality sea salt is used you salt dissolves better and also the probability of unwanted algae is much lower.
So ideally an aquarium compatible unit should have a TDS of Zero for best results. Try it once and you will see the marines doing better! |
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random2
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| Posted: Thu Feb 02, 2012 3:33 pm Post subject: Re: RODI unit Help Needed... |
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valuable information by Shelly and Adip.
Basically the filtering system are speced by lt/hr. This would be important as Shelly pointed out. You need to get a RO system for your needs. So first plan on your current requirements and if any additional tanks you plan to setup in near future.
And as Adip pointed out, you could look for near zero TDS. But this would slightly vary over time (in my opinion).
I know a person who builds RO units for bottling plants and hotels. He told me that most RO units have a feedback from the filtering stage to the output (bypassing the membrane) so that TDS slightly increases (As Adip mentioned). This wont be necessary for aquarium use.
So your best bet is to -
1. Get an idea of how much water you need per week
2. Go for a system built for the purpose or get it custom made according to requirements (or DIY if you are like Shelly  ). |
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Nonza
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Joined: Sep 13, 2009
Posts: 183
Location: Mumbai
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| Posted: Thu Feb 02, 2012 5:12 pm Post subject: Re: RODI unit Help Needed... |
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There are few more things to ponder....
1. Do you know what you're current TDS is? -- Order a TDS meter online, or from Hanna India.
2. If you do plan on using Aqua guard or kent or whatever, ensure that there is no addition of silver nano particles. Some of the units have the facility, and you may nuke your tank with it.
3. A typical RO unit (at least the one that I use) is as follows, in order...
Tap --> Booster Pump --> Sediment Filter --> Carbon block --> Pressure Gauge --> RO Membrane --> DI Unit --> Collection Drum
This gives me 0ppm TDS from source water of 87ppm |
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josyjames
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Location: Bangalore-Ramamurthy Nagar
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| Posted: Thu Feb 02, 2012 5:18 pm Post subject: Re: RODI unit Help Needed... |
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@ Nonza,
You have a very good water over there in your place...
Here in Bangalore, its very hard to get a water with less tds. My home water tds is 670ppm+ !!!!! There are places in Bangalore where the tds is 1000+ !!!! |
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Nonza
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Location: Mumbai
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| Posted: Thu Feb 02, 2012 5:35 pm Post subject: Re: RODI unit Help Needed... |
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@ Shelly
 I completely agree. In fact, I was pretty shocked with the levels. I expected far worse.
1000+ in Bangalore is pretty insane!
I also tested for Phosphates @ 0.00 ppm, Silicates @ 2ppm from my source water.
The important point to consider, is that you may or may not need a RO unit depending on your source.
@Tausey
For reference, I do run a softie reef using pure source water 87ppm. If you believe that 0 TDS REMOVES ALL algae problems, you are mistaken. It certainly helps, but without proper filtration and nutrient export, you'll still have some algae. Get a TDS meter first, and then decide for yourself, or post back, and we'll see how to proceed.... |
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