Kole tang

[delo978]

So here it is........I've had a Kole tang in my tank now for 3 months and never had any issues. Yesterday I added a power head and scape my rock work a bit to head the power head, now the tang has gone mad he constantly power swims at the new pump then goes on top and flicks it's tail at it. Do they like strong currents sometime or is he just ****ed that I added that power head and trying to attack it. I had never seen his defensive spines before I added that pump. Whats your thoughts?