Purigen re-generation process guide

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I wrote this for another forum thought I would share it here

Not sure if there is one on here so I'll write one up for anyone wanting to use Purigen.

What is purigen some may ask this is a copy and paste from Seachem

Seachem Purigen is a premium synthetic adsorbent that is unlike any other filtration product. It is not a mixture of ion exchangers or adsorbents, but a unique macro porous synthetic polymer that removes soluble and insoluble impurities from water at a rate and capacity that exceeds all others by over 500%. Purigen controls ammonia, nitrites and nitrates by removing nitrogenous organic waste that would otherwise release these harmful compounds.

I use purigen myself to keep 100% water clarity it removes tannins ect so the water remains crystal clear if you like tannins this product is not for you.

I run 200g in my filter that's 2 x 100g sachets they can be purchased for around £10.00 each and the good thing is they are reusable I have 4 in total so this makes the swap over procedure easier as while I'm using 2 the other 2 are going through the re-gen process.

For the re-genration process you need 2 products

Some will be looking thinking bleach yes you need bleach to re-generate it however it MUST NOT CONTAIN ANY SURFACTANTS in other words not thick bleach I have found the cheap Asda thin bleach to be perfect if thick bleach with surfactants is used it will clog the purigen and make it not work or unable to re-gen it also the worst is YOU RISK WIPING YOUR TANK OUT

Once your purigen is exhausted it will go from its white colour to a brown or even black it depends on your load how long it lasts before it needs a re-gen

These are the two removed from mine

They possibly would of gone longer but I choose to re-gen when they get like that.

Next you need a container one you can seal well and to fill it enough to cover the sachets you want a 50% bleach and 50% water solution and plonk them in and leave for 2 hours every now and then give the container a shake and agitate the purigen you will end up with something looking like this

After 2 hours I drain the bleach off and then re-fill with a new 50/50 mix and plonk purigen back in

I now leave the purigen in this mix for 48 hours and everytime I go past give it a little shake to agitate the purigen this helps to make sure it all gets exposed to the bleach.

After 48 hours remove from the bleach and fill container with tap water and give them a really good shake drain that off and next is fill with plain water only again and add 3 capfulls of seachem prime you can use other water conditioners BUT IT MUST NOT CONTAIN SLIME COATS ECT as this will clog the purigen.

Leave the purigen in this for 24 hours giving it a shake now and then to agitate it after 24 hours drain and re-fill again with plain water and 3 caps of prime drop purigen in and leave in this mix again for a further 24 hours this will 100% then remove any chlorine and make it 100% safe to return it back into your filter.

This is how mine have just come out

As you can see ready to do there job again it is normal to sometimes not get them 100% back to white but as you can see they as near as.


If you decide to do it like I do having 2 sets then once the set that is going through re-gen is complete keep them stored in an air tight container in water you do not want them to dry out they will then be there ready to be swapped over when needed.

I have used this process in both marine and freshwater with absolutely no issues or crashes but this guide is supplied as is giving my own experience using this product for a lot of years now and I cannot be held responsible should you have any issues if you follow the guide above there is no reason why you should have any issues.

Hope this helps

Sent from my SM-G975F using Tapatalk


  • Andy
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Reply #1

Awesome guide mate. 
I just want to reiterate the thing about using thin bleach,  I used thick once with my old reef and killed everything in the tank.  Sainsbury's is another place you can get thin unscented bleach if you can't find it. 👍



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