Canreef Aquatics Bulletin Board  

Go Back   Canreef Aquatics Bulletin Board > General > Product Review and Equipment Forum > Filtration and Skimmer Specific

Reply
 
Thread Tools Display Modes
  #1  
Old 03-29-2014, 05:55 PM
Madreefer's Avatar
Madreefer Madreefer is offline
Member
 
Join Date: Nov 2008
Location: Prince George
Posts: 2,064
Madreefer is on a distinguished road
Default RO Membrane Help

Looking to replace my membrane on Vertex Puratek will this membrane work?

http://www.jlaquatics.com/product/ro...29+Filter.html
Reply With Quote
  #2  
Old 03-29-2014, 07:04 PM
Reef Pilot's Avatar
Reef Pilot Reef Pilot is offline
Member
 
Join Date: Nov 2010
Location: Langley BC
Posts: 1,883
Reef Pilot is on a distinguished road
Default

Should work, if your unit came with a 100 gpd membrane. I am not familiar with that brand, though.

I know FilmTec (by Dow Chemical) are good quality, and very widely used be a lot of RO systems.
http://www.airwaterice.com/product/T...ne-100GPD.html
__________________
Reef Pilot's Undersea Oasis: http://www.canreef.com/vbulletin/sho...d.php?t=102101
Frags FS: http://www.canreef.com/vbulletin/sho...d.php?t=115022
Solutions are easy. The real difficulty lies in discovering the problem.
Reply With Quote
  #3  
Old 03-30-2014, 12:45 AM
mark's Avatar
mark mark is offline
Member
 
Join Date: Nov 2002
Location: Edmonton AB
Posts: 4,212
mark is on a distinguished road
Default

over on RC some posts on the difference in a couple percent increase in rejection rate makes on ro life and little surprised (going from 96% to 98% can double your di life table here).

I was looking at this one http://www.reefsupplies.ca/online-st...ectrapure.html
__________________
my tank
Reply With Quote
  #4  
Old 03-30-2014, 12:48 AM
spit.fire's Avatar
spit.fire spit.fire is offline
Second Best
 
Join Date: Mar 2011
Location: Abbotsford
Posts: 1,571
spit.fire is on a distinguished road
Default

Why not just get a vertex one? I'm picking one up on Tuesday
__________________
Guide to building super awesome rock structures / my tank journal
http://www.canreef.com/vbulletin/sho...d.php?t=116410
Reply With Quote
  #5  
Old 03-30-2014, 01:48 AM
Myka's Avatar
Myka Myka is offline
Moderator
 
Join Date: Mar 2004
Location: Saskatoon, SK.
Posts: 11,268
Myka will become famous soon enough
Default

Since you're replacing your membrane, why not switch out the in line flow restrictor to either a 75 gpd or 150 gpd (if you have enough water pressure) and buy a matching membrane? The rejection rate on the 100 gpd membranes is terrible, and as mentioned, will affect your DI resin significantly Flow restrictors are like <$5.
__________________
~ Mindy

SPS fanatic.

Reply With Quote
  #6  
Old 03-30-2014, 03:50 AM
Madreefer's Avatar
Madreefer Madreefer is offline
Member
 
Join Date: Nov 2008
Location: Prince George
Posts: 2,064
Madreefer is on a distinguished road
Default

Quote:
Originally Posted by Myka View Post
Since you're replacing your membrane, why not switch out the in line flow restrictor to either a 75 gpd or 150 gpd (if you have enough water pressure) and buy a matching membrane? The rejection rate on the 100 gpd membranes is terrible, and as mentioned, will affect your DI resin significantly Flow restrictors are like <$5.
It's already restricted down. I have the 200gpd unit.
Reply With Quote
  #7  
Old 03-30-2014, 03:52 AM
Madreefer's Avatar
Madreefer Madreefer is offline
Member
 
Join Date: Nov 2008
Location: Prince George
Posts: 2,064
Madreefer is on a distinguished road
Default

Quote:
Originally Posted by spit.fire View Post
Why not just get a vertex one? I'm picking one up on Tuesday
I tried calling the store you work at today. No answer. Do you guys have all the filters instock for my unit? If you do I'll call tomoro and order them all.
Reply With Quote
  #8  
Old 03-30-2014, 04:21 AM
Madreefer's Avatar
Madreefer Madreefer is offline
Member
 
Join Date: Nov 2008
Location: Prince George
Posts: 2,064
Madreefer is on a distinguished road
Default

Quote:
Originally Posted by Madreefer View Post
It's already restricted down. I have the 200gpd unit.
Oops my bad Mindy. I do have the 100gpd. Brain fart. I did have a restrictor in there before but I don't remember what it was. I believe I removed it. I will definitely be looking in to putting another one on there and thanks for posting that link Mark, that's good info. I'm thinking 50gpd if possible as I have a pretty big reservoir for RO water
Reply With Quote
  #9  
Old 03-30-2014, 05:21 AM
Myka's Avatar
Myka Myka is offline
Moderator
 
Join Date: Mar 2004
Location: Saskatoon, SK.
Posts: 11,268
Myka will become famous soon enough
Default

Quote:
Originally Posted by Madreefer View Post
Oops my bad Mindy. I do have the 100gpd. Brain fart. I did have a restrictor in there before but I don't remember what it was. I believe I removed it. I will definitely be looking in to putting another one on there and thanks for posting that link Mark, that's good info. I'm thinking 50gpd if possible as I have a pretty big reservoir for RO water
You should have a restrictor in there to match whatever the combined flow of the membranes is. My system runs dual 150 gpd membranes so the restrictor is 300 gpd. The flow restrictor is what forces the water to go through the membrane. If you run the system without a restrictor, you will be causing lots of water to bypass the membrane and very little to actually be going through the membrane. Why would you remove the restrictor?

If anything, you can use a restrictor that is less than the combined flow of the membranes, but then you are causing the membrane to flush less than recommended. So say you have a membrane and system that run 1:4 ratio of good RO to waste. If you use a lesser restrictor then you may cause the system to run 1:2 or even 1:1. By preventing the flushing though, you can cause the membrane to prematurely clog up. So it depends which you prefer - membrane longevity or wasting less water.
__________________
~ Mindy

SPS fanatic.


Last edited by Myka; 03-30-2014 at 05:24 AM.
Reply With Quote
  #10  
Old 03-30-2014, 05:56 AM
mark's Avatar
mark mark is offline
Member
 
Join Date: Nov 2002
Location: Edmonton AB
Posts: 4,212
mark is on a distinguished road
Default

pressure and temperature effect the output from the membrane so if your not at the membranes specs, been reading using a 75gpd restrictor might not be the best match for a 75gpd membrane. Here talks about trimming the restrictor, can also use a variable restrictor for the change in temp with change in seasons to keep at the 4:1 waste ratio.
__________________
my tank
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT. The time now is 04:55 AM.


Powered by vBulletin® Version 3.7.3
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.