another RO/DI question

AZ you are missing the point.

Here is an example where high CO2 makes buying a spectrapure a waste of money.

CASE 1 WITH 90% REJECTION AND HIGH CO2

70 TDS water supply. CO2 150 ppm

RO Membrane Rejection 90% gives 7 ppm + 150 ppm CO2.
DI chamber lasts 5000/157 = 32 GALLONS



CASE 2 WITH 98% REJECTION AND HIGH CO2

70 TDS water supply CO2 150 ppm

RO Membrane Rejection 98% gives 1.4 ppm + 150 ppm CO2
DI chamber lasts 5000/156 = 33 GALLONS


Wow you get a whole gallon more resin life with the 98% membrane.

Why would someone with water like this spend big bucks on a Spectrapure ?
 
Last edited:
I bought the identical ebay unit and have used it for approx 30 days. I filled my 600 gallon system with it and have been topping off with it since. I just got my TDS meter yesterday and tested it for the first time.

Water coming out of the unit measures 140 ppm :eek2: :eek2:

Maybe i found the source of my issue (dino problem)

In vegas our tap is crappy. It comes out at 540ppm.

This is a supposed 6 stage unit. I really like it because it has the tank for drinking which is split with a seperate supposed taste filter. It also has the auto shut off which is nice.


Do you guys think I should scrap this and order a spectra unit or should I change the guts out on this unit?


AZDesert has always given me great advice. He is one of the few on this website whose advise I do not question. Thanks.
 
<a href=showthread.php?s=&postid=11057248#post11057248 target=_blank>Originally posted</a> by vegaskid11
I bought the identical ebay unit and have used it for approx 30 days. I filled my 600 gallon system with it and have been topping off with it since. I just got my TDS meter yesterday and tested it for the first time.

Water coming out of the unit measures 140 ppm :eek2: :eek2:

Maybe i found the source of my issue (dino problem)

In vegas our tap is crappy. It comes out at 540ppm.

This is a supposed 6 stage unit. I really like it because it has the tank for drinking which is split with a seperate supposed taste filter. It also has the auto shut off which is nice.
Do you guys think I should scrap this and order a spectra unit or should I change the guts out on this unit?
AZDesert has always given me great advice. He is one of the few on this website whose advise I do not question. Thanks.
Click to expand...

{ sets up soapbox and climbs up, shaking head...}

This is EXACTLY what I JUST posted about...

See my post above. It CLEARLY states that the eBay units are only good f your tap water is fairly low TDS... (In an earlier thread I wrote that I thought the highest TDS it could handle efficiently would be around 250ppm...) If you KNEW going in you have "crappy water", with a TDS of 540ppm - WHY would you buy the eBay unit anyway???!!!

And I also said the FIRST & SMARTEST THING ANYONE SHOULD DO is to test your tap supply FIRST... which, AGAIN, you seemed to know should have been done - but, AGAIN, you didn't do it...?

And if AZ "has always given you great advice...I do not question it" then why didn't you FOLLOW it? I can flat-out guarantee you if you asked for his advice that HE didn't tell you to go out and buy that eBay unit :D

Sorry if I sound harsh... but, to me, you sound like you were at least a little informed beforehand re: your water quality - and THEN made a poor choice anyway... again, IMO, that's worse than the total noobie; who, at least, is totally ignorant and has no idea what to do or what to look for when he makes a poor choice...

And cases like yours become "ammunition" in threads where I get told my eBay unit is "a POS that flat out doesn't work", etc.

{steps down from soapbox...}

Anyway...At this point - since you already have the unit - I would say try getting better filters and a membrane and see where you end up. Worse case, you can always buy that Spectra and then keep the other filters as "spares"...
 
First off loud mouth. I have never asked AZ for RODI advise. Second, I bought the unit before I realized the quality of membranes and filters was so widespread. Obviously if I would have read this thread then I would not have gone that route. I didnt go cheap either. This unit was 150 dollars with all the damn drinking water tanks and connections I needed.

Your lousy attempt (soapbox analogy to emulate that you are lecturing me) to discuss reef topics would be better served elsewhere. You dont know me so dont ever try and lecture me.

THESE BOARDS ARE MEANT FOR DISCUSSION. OBVIOUSLY YOU GET OFF TRYING TO TELL OTHER PEOPLE ABOUT THERE MISTAKES

YOU ARE A PERFECT EXPAMPLE OF SOMEONE WHO DOES NOT BELONG HERE. GO GIVE YOUR SLANDER AND RIDICULE TO SOMEONE ELSE.

I posted my experience after reading this thread to back up the fact that ebay units are not high quality.

I did not expect for someone who is caught up in thinking they are a water expert to try and slam me. Get a life loser.
 
Apparently, "kid", everything I posted went right over your head and all you got out of it was you thought I was either insulting you or trying to lecture you. Which I wasn't, in either case.

Fine. Whatever.

And I'm sure you are all-knowing, having, what? all of 3 yrs in the hobby.

I'm also pretty damn sure when I set up my first SW tanks, back in the late 1970s, YOU weren't even born yet... (guessing that from the nifty "Pokemon" avatar)

So you just have a nice day.


P.S. - you probably shouldn't use words like "slander" if you don't know what they mean...
 
I am not sure how much pressure is going into the unit. I dont have a gauge on it. (I will probably get one when I order the replacement filters) I have it hooked up under my utility sink in the garage. Its being fed with a splitter from my washer supply. I pretty sure there is a flow restricter on this thing.

I guess while I paid so much attention to everything else I didnt consider that my Ro unit was not up to par.
 
Yes. I am a 28 year old kid. I also happen to own a 30 million dollar a year company. Yes, I know what slander is. My wife also knows what it is since she is a trial lawyer. My point to you now as it was then is do not attempt to lecture people you do not know. Climbing up on a soapbox is a lecture analogy. I am not your kid so don't pretend I am with your ridicule. You should learn to respect people. I would think a man of your (experience) would have learned that by now. There is no need to prove your credentials by boasting of 30 something years in the hobby.No one cares and I didnt question anything you said. We are here to discuss and learn reef topics. We are not hear to type a post and then have someone jump all over you because they think you should have done something different.

Now you try and insult my intelligence.

You sir have some issues you need to deal with.
 
Why not focus on the issue at hand. You are getting very poor rejection. Odds are a brand new shiny SpectraPure won't do much better if you don't track the problem.

You need to know your supply pressure, if it is below 50 psi that could be your issue.
 
Good idea. I agree.

Its possible then that I am lacking pressure. I dont know what standard hose bibs put out.
 
I guess I will be placing an order this week with the filter guys. I am pretty sure that this 140ppm water I was using was not helping with my nutrient control. I am dealing with a bit of a dino issue at the moment. Thanks for the help.

Jason
 
vegaskid11 - I upgraded my Ebay unit with filters from TheFilterGuys. You can read all about it on my <a href="http://www.reefcentral.com/forums/showthread.php?s=&threadid=1172882" target="_blank">DIY (Sort of) RO/DI</a> build thread.

RODO06.jpg


Jay
 
Sweeet. Thanks for the link.

I have to go to depot on my way home from work. I wonder if they have a water pressure gauge.
 
Nicely done Jay. I really like the dual gauges. I will pick some up on my home right now and find out where my house pressure sits.
 
You must log in or register to reply here.

Similar threads

Raptor72
Another RO/DI setup question(s)
Replies
19
Views
2K
griss
griss
B
RO/DI Automation and TDS creep
Replies
8
Views
1K
n2585722
n2585722
D
Crazy RO/DI question
Replies
5
Views
538
mcgyvr
mcgyvr
higorc
RODI filter system - waste-water ratio question
2
Replies
22
Views
5K
homer1475
homer1475
AquaCave
Save up to $117.00 on Vertex Puratek RO/DI Filters
Replies
0
Views
604
AquaCave
AquaCave
Back
Top