They might but it will probably only be for the first day. As long as you have sufficient room for them to have individual territories. I have a Clarki, a Tomato and a False perc in my 200. When the last clown (the false perc) was added. Every fish in the tank went after him. He got a few nips and hid out for a day. The next thing I knew (a bout a week later), he was swimming all over the tank and nobody was bothering him.
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