Ro/di unit!

[nyfynest22]

Hey everyone i was wondering if there is a way to get my tds to a 0? the water comming in is about 162 and my output is about 6 its a 5 stage ro/di unit. its a aquafx mako

 

[jadakiss]

Maybe u need to change the filters


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[nyfynest22]

brand new filters first day running it. should i let it settle in still or is there better filters? i have 3x filters, and 2x carbon chambers

 

[jadakiss]

If the filters are new and the membrane is new u should get 0 , that's weird


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[James983]

Ameter, re you using a in line TDS meter or a hand held? I know with the hand held when you put water to be tested in glass, the glass must be squeaky clean. Use a new glass, one without any type of deposits on it. Wash very well and dry with papertowels. Then put source water in glass and test. I have no experience with in line type meters.

 

[nyfynest22]

its built in the tds. damn i dont understand why i cant get 0

 

[James983]

you did run 5 gallons through it first right? If so, I would say borrow, a portable meter. Your TDS should be 0.

There is a guy AZdesert Rat on RC forums that works in a water treatment plant. He may be able to help you.

 

[nyfynest22]

yea i have run 5 gallons or more already, it was at 4 now it wont budge from 6, it doesnt matter that i have it in the garage does it?

 

[James983]

garage does not matter. I know I had same problem until I tested with clean glass. It's frustrating. Try find AZdesert Rat tomorrow. He's also on The Reef Tank site. Good luck!

 

[nyfynest22]

thanks james

 

[nyfynest22]

Ok so i figured it out. the company that made the ro unit had the tds after the membrane but before the carbon, so i put a ball valve in its place and took the tds and put it right after it goes in the bucket after the carbon and sure enough 0tds >)

 

[James983]

There you go. I knew you would get 0. I see you are on LI, are you already a member of LIRA? Great group of guys and girls, meetings held monthly in Hauppauge. Also, NERAC is March 20 at Atlantis and is well worth the price of admission.

 

[nyfynest22]

Hey James a buddy of mine on here was talking yo me about it. What are these meetings exactly?


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[James983]

I sent you a PM

 

[DHaut]

wait, you have the ro membrane before the carbon filters? that's backwards. water should pass through sediment filters and carbon filters before the ro membrane. DI should be last in the chain and the TDS meter should be after the DI.

where did you get this ro unit?

 

[nyfynest22]

it came like that through the factory

 

[masterswimmer]

David, isn't the order of the filters like this:

sediment filter
carbon filter
RO membrane
carbon filter
DI resin

The second carbon filter SHOULD be after the RO membrane.

Russ

 

[DHaut]

what good does the second filter do after the ro membrane? not arguing - just curious.

 

[nyfynest22]

ok this is how it goes going from right to left. sediment filter, di,di,ro,membrane,carbon,carbon = out

 

[DHaut]

unless i'm misunderstanding, that seems completely wrong.