BRS RODI units

AZDesertRat · Jul 24, 2015

No, it is a 1 micron near absolute rated sediment filter, a 1 micron 12,000 gallon carbon block, a 90 GPD specially treated and batch tested high rejection rate RO membrane and a single full size vertical refillable 20 oz DI filled with SilicaBuster specially designed reef specific DI resin. 99.9% of the time there is no need for dual DI if the RO membrane is doing its job.

JFrar · Jul 30, 2015

So I did a test run last night and made 5 gallons, very easy to hook up ... Only thing I was wondering is when I'm done the unit is still filled with water, did not see anything for emptying it out in the instructions ..

Any help here ? Or do you just leave it and run it through for 5-10 minutes next time before collecting the rodi water

cginter · Jul 30, 2015

I use the brs 5 stage with 1 DI unit. What ever u do make sure you have an inline TDS meter installed on your unit that and a pressure gauge will help tell you if things are running correctly and when things need to be changed. In my opinion you don't need 2 DI filters. You cant get the water any cleaner than when it comes out at 0 TDS. I've been running this unit with the se filters for 10 months so far and it still comes out as 0 TDS.

ImageUploadedByREEF2REEF1438268980.548077.jpg

JFrar · Jul 30, 2015

Ya it has a built in tds meter for the water input and output with gauge attached. Was running at 60psi which I understand is adequate. Just wondering about the water that's in the unit when I'm done. Thanks

Feltman · Jul 30, 2015

The filters need to remain wet when stored so don't drain it. Next start up let the fresh water line drain for a min or 2 to let the standing water dump. Also they make some with flush kits that are handy to use on start up. As far as the dual di stages it's not needed at all but the misconseption is its not to clean the water further it alows u to extend the life of ur di stages.

JFrar · Jul 30, 2015

Thanks!

AZDesertRat · Jul 31, 2015

Forget the inline TDS meters as they lack the accuracy of a good handheld which is ATC compensated and much more useful.
Always store the unit in a dark climate controlled space with water in the housings and use it at least every 10-14 days to keep it fresh. Dual DI gets the treated water to a true 0 TDS or 18.2 megaohms resistivity as well as extending the resin life for a lower cost of ownership. It is not a myth or misconception. No need to flush the incoming water but it is nice to have a DI bypass valve to flush the TDS creep out, flush kits do not do this since they are on the waste line not the treated side of the membrane.

JFrar · Jul 31, 2015

Cool, i will be using mine every 3-7 days at max. I think i'm going to take your advice on another TDS meter to be safe. Probably look into the dual DI in the future at somepoint. Thanks for the consistent input AZDesertRat

AZDesertRat · Aug 1, 2015

Don't waste your money on the dual inline, once you have a good handheld you won't even turn the inline on anymore. With the handheld you can accurately test your tap TDS, RO only, RO/DI, your ATO storage, bottled water, LFS water, vending machine water, your reefing buddies water etc. With the inline you are stuck with two dedicated points and it is not temperature compensated so can be inaccurate if the air temperature (which it actually senses, not the water) and water temperature are exactly the same.

twilliard · Aug 1, 2015

AZDesertRat said:
Don't waste your money on the dual inline, once you have a good handheld you won't even turn the inline on anymore. With the handheld you can accurately test your tap TDS, RO only, RO/DI, your ATO storage, bottled water, LFS water, vending machine water, your reefing buddies water etc. With the inline you are stuck with two dedicated points and it is not temperature compensated so can be inaccurate if the air temperature (which it actually senses, not the water) and water temperature are exactly the same.

Uh probes use conductivity not temp

AZDesertRat · Aug 1, 2015

The temperature probe on the inlines is not in the water, it is inside the fatter part of the probe inside the little rectangular window. If you cut one apart, as I have done, you will see it is sensing air temperature, not water. It is separate from the conductivity probe which is used to read TDS. An ATC compensated TDS meter has the teperature probe immersed in the water and it uses the water temperature as a correction factor for more accurate TDS readings.

twilliard · Aug 1, 2015

Ohh got ya!
sorry!

AZDesertRat · Aug 1, 2015

Temperature is very important when calculating TDS since the conductivity of water changes at different temperatures. With the inlines not sensing the water temperature they are not nearly as accurate since we all know the air and water temperatures are rarely the same.

azjohnny · Aug 2, 2015

JFrar said:
hey guys, thanks for all the input... im pretty much down for the $125 unit since 2 of you guys recommended it and the price is pretty easy on the pocket

http://spectrapure.com/RO-RODI/RODI-SYSTEMS/Refurbished-90-GPD-RODI-System

hoping i get a quick input on this question ... this one is dual DI right ???