Why..... YES IT IS! Hope you got some time buddy, I got a follow up question

According to the DNF 35% H202, I added .5 ml per liter on Tuesday.
(I had 56 liters water, and added 28ml h202)

How long does H202 stay in effect? I want to add Cannazym tomorrow (Sat) but I'm not sure if the H202 is still present and effective enough to not be able to add the additive in the tank yet.

I can wait till I change the tank in a couple days but if I can add it on Saturday and get a head start, I would like that as well.