best reverse osmosis for aquarium

[mikesilverado8888]

What's the best and cheapest ro

 

[dbl]

You will probably get a lot of suggestions, but I would start here: http://spectrapure.com/RO-RODI/RODI-SYSTEMS/Refurbished-90-GPD-RODI-System

@AZDesertRat is one of the water experts on the site, so maybe he'll chime in and help.

 

[Shawn Bishop]

Hey mikessilverado8888, I use the spectra pure brand RO. I have a 90 pd unit and I love it!

 

[mikesilverado8888]

I heard of the brand thank you

 

[mikesilverado8888]

What I about this pen I hear you need to test it with I don't know what it's called

 

[helmerbang]

Bulk Reef Supply

 

[dbl]

It's called a TDS meter. Here's just one example: http://www.bulkreefsupply.com/tds-3-handheld-tds-meter-hm-digital.html

 

[Up2no6ood]

I reccomend testing you water and go from there. If your water is high on tds, phosphates and other contaminates its better and cheaper in the long run to go with a more expensive 5 6 or even 7 stage rodi. Than it is to go cheap off the bat and burn through media.

 

[Randy Holmes-Farley Verified Community Expert]

I reccomend testing you water and go from there. If your water is high on tds, phosphates and other contaminates its better and cheaper in the long run to go with a more expensive 5 6 or even 7 stage rodi. Than it is to go cheap off the bat and burn through media.

I'm not sure how adding stages (presumably more DI resins) saves media.

The only way I see that is if you have two DI's and run the first until the TDS almost approaches the value for the water entering it. Then swap the second one into the first slot and replace the second one with new resin. In that fashion you use nearly all of the DI capacity of all of the resins.

 

[Randy Holmes-Farley Verified Community Expert]

What I about this pen I hear you need to test it with I don't know what it's called

I would not get a hand held TDS meter. I'd get an RO/DI with inline TDS meters.

 

[Up2no6ood]

I guess I was comparing a system like an ro bubby to a.more expensive unit. Wouldnt having the ability to have an extra carbon block or sedimate filter save you on the di resin?

 

[Randy Holmes-Farley Verified Community Expert]

I guess I was comparing a system like an ro bubby to a.more expensive unit. Wouldnt having the ability to have an extra carbon block or sedimate filter save you on the di resin?

Nope. They remove different things.

 

[Up2no6ood]

Good to know!

 

[Opus]

I guess I was comparing a system like an ro bubby to a.more expensive unit. Wouldnt having the ability to have an extra carbon block or sedimate filter save you on the di resin?

No, the sediment and carbon blocks are there to save the RO membrane, not the DI. A better RO membrane will save your di resin.

I would also go with a hand held tds meter since most compensate for temp, the in-line ones do not, at least not the ones I've seen sold with RO units.

 

[mikesilverado8888]

I'm going get the Aquatic Life RO Buddie Three Stage Reverse Osmosis and add the di with it

 

[Randy Holmes-Farley Verified Community Expert]

No, the sediment and carbon blocks are there to save the RO membrane, not the DI. A better RO membrane will save your di resin.

I would also go with a hand held tds meter since most compensate for temp, the in-line ones do not, at least not the ones I've seen sold with RO units.

Perhaps, but is that important? If you are trying to show whether the DI has 0 ppm TDS in the effluent (which is mostly what is important), the temp correction is unnecessary, and contaminants in collected water (including CO2 from the air) readily push the TDS above 0 ppm when measured after production by a conductivity meter.