No expert on aero cloner but try to clone on cooler temps. I had the same issues years ago.
It is often that i saw all kinds of troubles because the aero rez was to warm.
H2O2 never gave me good results, i found it was very unstable.
Home made rezcleaner does the job, also Collodial Silver works but is more expensive (i do not have a Collodial silver machine)
Ive experienced that additions of an kinds, they are troubles.
Keeping it simple, Tapwater, rezcleaner and for example Hormex (very easy to DIY) for 7 days
Dump
next 7 days, Tapwater, flowering nutes and rezcleaner does the job here.
When i started loggin the rez water temps, things became clear to me.
Slime or no slime depended on the rez temps here.