my RO water
- Thread starter padi200
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jansenwrasse
New member
You can do that if you would like. It may effect things like pH of the RO water. Kalkwassar will works also, precipitating PO4 as Ca3(PO4)2.
Good Luck
Good Luck
AZDesertRat
In Memoriam
As I said in your other thread it will not do anything for you. Phosphate medias depend on multiple passes through the filter over time, they work slowly so the more water you can bring to the media is a structured environment the better they work. Hence the reactor on the tank as you said you already have.
If you want to improve the RO water add a DI filter on the end.
If you want to improve the RO water add a DI filter on the end.
jansenwrasse
New member
AZ: I would have to disagree. 
If you run a phosban reactor with GFO in the reactor the effluent water will have a lower PO4 concentration than the tank in a single pass. There is a multi - layer contact time benefit to a reactor but one pass is all that is needed.
A DI addition to the RO system is by far the best way (and easiest).
If you run a phosban reactor with GFO in the reactor the effluent water will have a lower PO4 concentration than the tank in a single pass. There is a multi - layer contact time benefit to a reactor but one pass is all that is needed. A DI addition to the RO system is by far the best way (and easiest).
AZDesertRat
In Memoriam
It does not work that way. GFO and other medias were borrowed from the drinking water industry and I have worked with them for decades. The only way you can make it work like that is extremely large bed volumes and excrutiatingly slow flows for long long contact times.
Playa-1
In Memoriam
The DI in the LA area would be more for dealing with Chloramine. Unlike Chlorine that is effectively filtered out with a Carbon prefilter the Chloramine that they use to treat water around here is not effectively taken out by Carbon media. So what happens is it traces pass right thru the Carbon and RO membrane and can give you a positive Ammonia reading in the tank.
I would think you would be better off adding a DI add on kit to your RO system and using the phosphate media in your tank with a media reactor.
I would think you would be better off adding a DI add on kit to your RO system and using the phosphate media in your tank with a media reactor.
jansenwrasse
New member
Chloramine is only removed at the carbon filter is does not dissociate into its charged particles for the DI to remove.
Don't take it from me
there is no doubt that GFO is effective at rapidly and efficiently reducing orthophosphate concentrations. It may also be at least partially effective at reducing organic phosphate levels, but fewer data are available on such removal since few aquarists measure organic phosphate.
That is from Randy's article on GFO binders.
Don't take it from me
there is no doubt that GFO is effective at rapidly and efficiently reducing orthophosphate concentrations. It may also be at least partially effective at reducing organic phosphate levels, but fewer data are available on such removal since few aquarists measure organic phosphate.
That is from Randy's article on GFO binders.
Aquarist007
New member
excellent discussion guys and I'm actually following it this time
AZDesertRat
In Memoriam
The chlorine portion of chloramines is removed by carbon. A portion of the ammonia is removed by the membrane and the rest is taken care of by the DI resin.
Fresh or virgin GFO may work rapidly but it degrades with time as it becomes saturated with contaminates. I will stick to what I have learned about ferric media over the last 34 years in the business regardless of what Randy or anyone else says.
Fresh or virgin GFO may work rapidly but it degrades with time as it becomes saturated with contaminates. I will stick to what I have learned about ferric media over the last 34 years in the business regardless of what Randy or anyone else says.
Aquarist007
New member
Az, why are reefers reporting levels of ammonia in the filtered water from a ro/di unit esp if the tap water contains chloramines?
Does tha mean the membrane has degraded?
i hate confrontation and always avoid it if possible, i will say that AJ knows his stuff when it comes to water and has 34 years experience, i beleive his opinion, however i also think randy is superb, lets not try to cause any problems here, just make your own mind up
AZDesertRat
In Memoriam
Ammonia compounds (amonia, nitrates, nitrites) are one of the tougher things a membrane has to deal with. Note most membrane manufacturers state only about 90% rejection on ammonia. I am a firm believer it takes a complete system such as the MaxCap to be completely effective. Its the superior quality carbon, individually hand tested 98+% membrane and dual custom blended resins designed for specific needs that do the job. One piece or even a few these components without the others is not as effective.
I agree on the confrontation. Randy and I have different backgrounds, he is a research chemist I am a water treatment professional. Water utilities employ both as they work as a team.
I agree on the confrontation. Randy and I have different backgrounds, he is a research chemist I am a water treatment professional. Water utilities employ both as they work as a team.
Aquarist007
New member
Not confrontation--discussion---and that's how we all learn
There are many effecient ways of accomplishing the same thing in this hobby and many experts here to share their ideas. Also every tank is its own ecosystem with its own set of variables.
I don't think I have ever heard any of them state "my way or the highway"
There are many effecient ways of accomplishing the same thing in this hobby and many experts here to share their ideas. Also every tank is its own ecosystem with its own set of variables.
I don't think I have ever heard any of them state "my way or the highway"
<a href=showthread.php?s=&postid=13074178#post13074178 target=_blank>Originally posted</a> by capn_hylinur
Not confrontation--discussion---and that's how we all learn
There are many effecient ways of accomplishing the same thing in this hobby and many experts here to share their ideas. Also every tank is its own ecosystem with its own set of variables.
I don't think I have ever heard any of them state "my way or the highway"
agreed
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