I have a fully cycled 10g with 5 panda cories. I was thinking about adding a single fish as a centerpiece/pop of color. No bettas because the temp is too cool for them, but maybe a dwarf gourami? Could I keep just one, or is it recommended they stay in pairs or more? I’m just looking for a little more movement in my tank and I don’t really want a schooling fish. I’d be fine with a pair. Opinions/suggestions?