I have a 30 gallon tank with natural color gravel, two pieces of artificial driftwood, some plastic plants, bubble wall, and one action air ornament. I do not have any fish yet, but I was looking to get a Bolivian Ram. I was also looking to get some other fish. I was looking to get some Cardinal Tetras, Black Neon Tetras, and Harlequin Rasboras. Will anything else go with a Bolivian Ram? From what I've read, I should only get one Bolivian Ram. Is this true? If this is not true, how many would you recommend? I'm looking for this to be the first fish that I get out of the others. The Ram will also be my main fish.