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-   -   Purigen? Should I consider a reactor? (http://www.plantedtank.net/forums/showthread.php?t=193552)

Rainer 10-10-2012 11:39 PM

Purigen? Should I consider a reactor?
 
I've read it strips out nitrate -so is this for fish/shrimp only tanks?

Monster Fish 10-10-2012 11:41 PM

It removes organics that will break down into ammonia, nitrite, and eventually nitrate. It won't remove inorganic (fert-based) sources of nitrate.

Rainer 10-11-2012 12:04 AM

How effective is it in reducing TDS? I have a 2217 running on a high tech 29g and want to keep Neos, maybe Tigers if conditions permit. I'm reducing ferts as much as I can but TDS is currently 250.

Is a fluidized reactor remarkably better than stuffing it inside the canister with the Bag?

Monster Fish 10-11-2012 12:11 AM

Not sure on how much it would reduce the TDS. The best way to reduce TDS is to do water changes. 250 is a bit on the higher end but neos are pretty hardy. What's your KH, GH, and Nitrates?

I haven't use a fluidized reactor so I wouldn't know.

Rainer 10-11-2012 02:06 AM

Values are in flux as I try to solve a deficiency (Mg or an insurmountable CO2 problem) and throttle back on the ferts. Typically it's around:
GH 8
KH 7

Nitrate has been sky high as the test strips were faulty. My target is 5-10 ppm just prior to the next KNO3 dose.

Monster Fish 10-11-2012 02:23 AM

dGH = 8
dKH = 7

1dGH/dKH = 17.868 ppm, rounded upto 18 ppm for simplicity

GH = 144 ppm
KH = 126 ppm

GH + KH TDS = 270 ppm

Um... either your TDS meter isn't calibrated or you measured your KH and GH wrong.

Rainer 10-11-2012 02:28 AM

GH and KH readings were from 9/30, before I started the Mg experiment and before the TDS meter arrived. The TDS reading is from today. It was as high as 292 on 10/3 and down to 201 post-WC on 10/7.

Monster Fish 10-11-2012 02:29 AM

Thanks for clarifying. Any reason why the KH is so high?

ccbeauch 10-11-2012 02:38 AM

I just bought one last week. It turned yellow very quickly. I think it was doing its job of getting the tanis out of the water (or what ever the tea colored stuff is). I was wondering if anyone knows how to properly regenerate it. I know it says so on the package and all but just wanted to double check before I put something soaked in bleach into my discus tank:icon_eek:

Rainer 10-11-2012 02:40 AM

Quote:

Originally Posted by Monster Fish (Post 2039522)
Thanks for clarifying. Any reason why the KH is so high?

Tap is 6-7.

Monster Fish 10-11-2012 02:40 AM

Quote:

Originally Posted by ccbeauch (Post 2039533)
I just bought one last week. It turned yellow very quickly. I think it was doing its job of getting the tanis out of the water (or what ever the tea colored stuff is). I was wondering if anyone knows how to properly regenerate it. I know it says so on the package and all but just wanted to double check before I put something soaked in bleach into my discus tank:icon_eek:

Soak it in the bleach and water solution as stated in the directions on the package, rinse it several times, add a generous amount Seachem Prime, then rinse until the smell is gone. I've regenerated it with just straight bleach before with no problems.

Monster Fish 10-11-2012 02:42 AM

Quote:

Originally Posted by Rainer (Post 2039536)
Tap is 6-7.

Ah. Neos should be fine in that high of a KH. I keep my rilis in 6 dGH/dKH. However, I'd bring it down if you want to keep tigers in the tank. Have you thought about using RO for water changes?

Rainer 10-11-2012 03:04 AM

Quote:

Originally Posted by Monster Fish (Post 2039543)
. Have you thought about using RO for water changes?

Thought about it but it doesn't seem that practical on an EI tank at that volume and storage space is limited.

Rainer 10-11-2012 03:09 AM

Quote:

Originally Posted by ccbeauch (Post 2039533)
I just bought one last week. It turned yellow very quickly. I think it was doing its job of getting the tanis out of the water (or what ever the tea colored stuff is). I was wondering if anyone knows how to properly regenerate it. I know it says so on the package and all but just wanted to double check before I put something soaked in bleach into my discus tank:icon_eek:

There's a thread about how recharging Purigen can be potentially toxic if you use CSM+B. You've probably seen it but I'd hate for something happen to those discus.

Monster Fish 10-11-2012 03:10 AM

Well, I've read your thread with the magnesium deficiency with your hygros. How are they reacting to the added magnesium?


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