[anitsirk92]

My boyfriend is giving me his 20 gallon long tank with a filter and heater. After I cycle the tank I want to get a new betta and Julii cories for the tank. I'd like to put in as many cories as possible because I know they are happier in bigger schools but I also don't want to stress out the betta. Also, should the betta be put in first or should I put him in after the cories? I know male bettas get very territorial.

 

[Fernfronds]

Definitely put the Betta in last to avoid territorial behavior. With Julii Cories, maybe 6-8 of them. I have 5 Black Fin Cories in my 29gal tank, but I think Juliis may stay a bit smaller than them. I have not had Juliis specifically though. You can always use AqAdvisor.com to plan things out.