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- Dec 28, 2016
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Keeping it 'cold' i.e. in a refrigerator may extend it further...OK
As a prelude to setting up the Oxydator, I did some research concerning the shelf life of H2O2:
Apparently, 3% hydrogen peroxide has a shelf life of 3 years, unopened. Once it's opened, maybe 6 months.
However, a 35% concentrate has an unopened shelf life of about a year. Once it's opened about 6 weeks.
Might not be that big a deal for people with larger tanks, but when you get in the Nano range it can become cost prohibitive, as, I would expect, most of the H2O2 would dissipate, before it could be put to use.
Aside from the obvious precautions, such as keeping in a cool area and not exposing to light are there any other tips to maintaining the shelf life after opening.
Would you say, for example, diluting a 35% concentration to a lesser dose, extend the life of the H2O2?
BTW, I have an open bottle of H2O2 (3%) which I purchased within the last year. I performed the "sink" test; poured some in the sink and there was no bubbling, which is an indicator it has turned to water. If the 3% solution lost its effectiveness so quickly, I can only imagine what can happen with a concentrated one.
All the more reason to use 3% H2O2 and supplement with additional catalysts.
Unfortunately, theshrimptank.com are currently out of the regular sized catalysts. Does anybody know where I might get them in the US?
They do, however, have the mini catalysts. Does anyone have an idea how many of them might be the equivalent of a normal sized catalyst?