I have 3 pairs of clowns in a 1200 gallon tank. Ocellaris, Maroon, Tomato. They all host in bubble tips. Even though thier territories are 5 feet apart and visually seperated there is still occassional aggression when the 4inch female tomato ventures out to kick some ***. This would never work in a 150. The Ocellaris's stay in one tiny area and never leave.
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