Rodi

[Craigar]

I have a 100 gpd rodi unit it's a 6 stage
1st sedement
2-3 carbon
4 ro
5 di
6 inline carbon
My question is Next month it's time to replace the membrane are tyey universal or do I need to go through who I bought the set up from?


300 gallon mixed reef
90 gallon bowfront fowlr

 

[dv3]

they should be universal as long as you get the same size

just curious...why do you think its time to change the membrane next month?
they usually last 3-5 years or more ...do you have a tds meter to test it

 

[Craigar]

Well it's going on 2 years old and I'm changing all my filters so I figured I should go ahead and change it! I thought it was 2-3 years to change it? I don't have a TSS meter that's getting bought this go around to


300 gallon mixed reef
90 gallon bowfront fowlr

 

[dv3]

im just guessing here but its and educated one
i would say buy a dual tds with your filters and test your water out of your membrane before the DI if its less than 5 (mine is between 0-2) i would say you are good for atleast another year ...no sense in wasting $ if you dont need too

 

[Craigar]

Anywhere local that I can get a inline for a good price


300 gallon mixed reef
90 gallon bowfront fowlr

 

[dv3]

not sure of anyone that sells them ...might check some hydroponic shops

 

[Craigar]

Is there different grades in membranes? Is a certain brand better?
What brand rodi unit do you have I have a water general. 100 gpd


300 gallon mixed reef
90 gallon bowfront fowlr

 

[dv3]

most places dont list their brand but DOW is supposed to be the best ....i wouldn't worry about that though
there is a certification it should have ...forget the name NCE? maybe i dunno

my rodi is pieced together from several i have 2 membranes piggy backed for less waste water

 

[Craigar]

That would be nice how did you piggy back them


300 gallon mixed reef
90 gallon bowfront fowlr

 

[dv3]

you run the waste out of the first to supply the second ...and you have to pull the "restricter" out of the first

 

[Craigar]

I just ordered a dual Tds meter and new filters minus the membrane I want to see where I'm at.

Where are you suggesting that I put my two meter points?


300 gallon mixed reef
90 gallon bowfront fowlr

 

[dv3]

you put one before di and one after
the one before tells you when to replace the membrane
the one after thells you when to replace di

a pressure gauge tells you when to replace your filters