Thanks for asking. Unfortunately my betta and the last CT died, so all that's left is the oto. Another sad thing is I can't find the assassin snail in the tank anywhere. I looked under all of the plants and decor so he must've dug into the substrate.
The good news is my master (liquid) test kit came today. I tested the Ammonia, Nitrite and Nitrate. Ammonia and Nitrite were both at zero and the Nitrate was reading around 25-30. So all is good there! Just running the filter with the carbon in now for another week to help clear out anything else that shouldn't be in there (leftover fungus spores, etc.).
Then it's time to start restocking (slowly).