Using concentrated bleach to regenerate purigen? - The Planted Tank Forum
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post #1 of 6 (permalink) Old 10-04-2015, 09:02 PM Thread Starter
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Using concentrated bleach to regenerate purigen?

I bought a bottle of regular Clorox bleach, however it says it is concentrated. On the label it says that it is 8.25% Sodium hypochlorite. And 91.75% other ingredients. Any people that have a modified version of the regenerating instructions that account for concentrated bleach? Will it be fine to use? What can happen if you use too much bleach?
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post #2 of 6 (permalink) Old 10-05-2015, 01:55 AM
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Past month just regenerated a container of Purigen.
50/50 bleach and water in Purigen container.

No issues, had to bleach twice though for a full restoration.
Soaked in water with 5x dose of prime, tested for chlorine and all gone.

Maybe you won't need to bleach twice.
Some have stated that Purigen will not whiten like new.
Twice with bleach will be as good as new.

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post #3 of 6 (permalink) Old 10-05-2015, 03:07 AM
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Not a big enough difference to tell. The main difference will be that the "concentrated" bleach may sell better to those who want the best cleaning for things like toilet bowls where there is no concern with damage like one might find in doing laundry. The cheap stuff I use is more often 5.5 or 6 %. If you wanted to do some figuring, you could add some water and dilute the 8.25% down to be 6% but that is more than I would bother doing. The main difference in bleach and the chlorine in the water we drink is how much water dilutes it. For hobby use, I just go for the cheapest and stay away from any that has scent or colors added.

I just found a new way to test for chlorine content! I put some wood and rocks in the tub for soaking and set it out beside the garage. Out of sight and out of mind so I left it for several days and when I went back it was full of mosquito larva!!~! No chlorine left in the water.
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post #4 of 6 (permalink) Old 10-05-2015, 03:18 AM
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The regular Clorox bleach is 5.5%, so 8.25% is not a much larger concentration. Use 50/50 water/bleach and the bleach concentration differential will be minimal. In fact, it may work a little quicker and more effectively. Should be no problem whatsoever - just rinse well several times after re-generation & condition the final rinsing with a double dosage of Prime for the water quantity being used.
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post #5 of 6 (permalink) Old 10-05-2015, 03:56 AM
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You can skip the water and go full strength bleach. It will speed up regeneration. Just rinse it out really well.

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post #6 of 6 (permalink) Old 10-06-2015, 07:12 AM
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Yeah, I use 75% bleach and then add 23% water to mix it up a little. Doesn't come out pearly white but more of a really light tan.
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