I have bought a 20 gallon long and will be setting it up shortly. How do you decide which males to house together? Do you put them all in the tank at the same time with dividers or go one by one over time? I would like to house 4 together. Do you consider size? Whether they are easygoing? Do you let them hang out side by side in separate tanks before doing dividers? What is your process?
Here's a little about my fish:
I already have 2 that sit side by side already in their separate tanks and have no reaction to each other. They don't flare at each other. They don't even flare at me. In fact I've never seen them flare. However, sometimes I wonder if the other betta Ollie even knows he's looking at another betta as Gossamer is pretty much like his name you barely see him. It's like having a little faery or insect flitting around in the tank with a little pinkish white head. Both are just easy going fish.
Zeus is slightly shy but seems relaxed, John Clyde is very active and flares mildly at people and really flares at other fish. Curly Gallo-well he's just a chicken I think may be excluded he get's pale if he sees another fish and shows dark stripes beneath his coloring. Nano is he is very interactive with me and he flares at me sometimes. I am not sure how he'd react to other fish. I do think he loves his current five gallon tank.
There are two others I am still getting to know. One I am not sure if he will recover from the poor treatment at the box store but he is huge. He looks like a veil tail crossed with a king. Otherwise I don't know how he could be so big. The other one is a small red veiltail with some blue irredescent scale who I could have left he was doing ok but I admired his spunk- he still was making a bubblenest in a cup at the store. He's made more than one in the weeks I've observed him. I just came for the huge one he was suffering from ammonia poisoning had been there at least three weeks but left with two bettas. I learned that females should not be in with males so Penelope will stay where she is. She is really small and I think she is happy in her set up.
I'd appreciate any pointers. My husband is not crazy about having fish everywhere. We have plenty of room to house and I have time to do water changes but he is really puzzled by my recent renewed interest in fish ( I had a regular fish tank before we got married) and he really can't understand why bettas? Why not just get fish you can stick all in one tank without them killing each other.