I'd check ammonia, nitrites, and nitrates every day for a few days, and if you show any ammonia or nitrites, or nitrates get to 40, do a change. If nothing shows, don't bother. Maybe others would do something different.
I wasn't very clear, you should do a weekly water change regardless, but you may need to do one earlier if your raising the stock level starts showing ammonia or nitrites, or 40ppm nitrates. Sorry about that.
Thanks for advice. Levels are all perfect! Ammonia and Nitrate readings are at 0 and Nitrates are around 25-30. Considering these levels, should I still do the weekly water change tomorrow?
The Juliis are looking very content. They are eating well, active and swimming around together a lot.