If you have seen your levels go up and come back down to zero you are OK to go ahead and start adding livestock. I am conservative would probably break your initial list into 2 parts. I'd add the fish and a hermit or snail and monitor your levels. If they go up wait until they come back down to add the rest. If they don't move then you could add the others in two or three days. I have found that shrimp are sensitive so I might not add the cleaner shrimp right away.
I always let my tank recover after adding any any new inhabitants. Since I
QT everything that goes into my tanks for 2 - 6 weeks the recovery time for my aquarium is built in.
BTW, when using a
QT tank if you add any new critter to the
QT tank the quarantine period starts over.
