It's been a few days since I've replaced my uniseal and I also put silicone around the uniseal and the pipe going into it. I checked the reactor and there wasn't a single air bubble in it!!

Thanks everyone for your help

I have always "burped" my reactor every 2 or 3 days as part of my ritual. I check it more often now for leaks around the seal, but now that the reactor sits in my sump it's not such a concern any more.lmao