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In Hydroponic gardening, there are harmful bacteria strains that will thrive in low oxygen content water. If your Hydroponic nutrient tank solution tends to be usually on the warm side at 70 degrees or more, your Hydroponic tank and your Hydroponic growing medium is more likely to be a breeding ground for harmful bacteria and pathogens. This is because room temperature or warm water holds very little oxygen in it. The warmer it gets, the less oxygen it holds.”.
Sorry about the bold. Not intentional. Copy and paste.
https://rgjhydroponics.weebly.com/hydrogen-peroxide.html
I wouldn't use peroxide in a live system. Either go live or sterile can't do both. What you posted is true but only half of the truth. All bacteria good and bad thrive in those conditions. The bacteria themselves consume oxygen and a bacterial bloom of any kind can lower o2 levels this is why teas needs high amount of aeration.
But with adequate o2 replenishment it's not of concern.
If your going to run a live system OP you will want to start seeding good bacteria right from the start. In a cloner I would also change the water every 3-4days there is not really a good place for bacteria to colonize in them so they will need to be replenished more often. If you are running live you will also want to use dechlorinated water.
I clone in rooting pucks and will seed with good bacteria in DO used to initially saturate them. This provides some decent area to colonize.
Personally I would just change the water every 3 days using tap water and start seeding with bacteria once you transplant. Personally I feel unless your willing to supplement bacteria weekly you need some media be it substrate or a filter that provides a good amount of surface area for bacteria colonies that is not completely submerged.