Perhydrol H2O2 what catalyst do to use?

Hi
(3-6%) 2 H2O2 -----> 2 H2O + O2

What catalyst the best to use, so in order to to alter him np on month
once, or this can be lead, silver, MnO2? Can some different? maybe ceramics?
it walks about production in aquarium oxygen.

for example

http://www.marine-monsters.com/front/products/add_oxydator.html



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