In all my fish keeping years I've only kept bettas, in a 2.5 planted tank all to themselves, but from what I hear, they are about the easiest fish to keep.
In regards to plants, the only ones that managed to survive in my aquarium were the java moss and the java fern, which have about the same reputation as a betta.
Lately I've been feeling the need to have more fish, bettas are nice, and I love them. But I'd really like more variety, so I'm seriously thinking of upgrading to a 10g, which is the largest tank that would fit on my desk.
I still need easy to care fish, something a beginner can handle. I was thinking of tetras, corys, danios, ottos, but I'm not sure if they're the right choice, or if they would be happy in a 10g.
As a note, I naturally have VERY hard water in my region, the tests I've tried all give it the highest marks in regards to hardness.
I'm looking for options, any ideas on what I could keep? I'd really appreciate any and all the help I can get