I don't know that I would suggest more fish, while she doesn't have any real heavy messy eaters she does still have atleast 4 fish I believe in a 26g tank with no plans to upgrade anytime soon now. So, even with a decent overrated (for her tank) skimmer I wouldn't try pushing the limits to much either. But just space/ territory wise I'd say the tank is maxed for fish.... and I am a fan of overstocking fish lol