After a few days of zero nitrates and my cleanup crew going strong, I put 2 very small clowns and a shrimp in the tank a few hours ago. The clowns stuck together for a while but are now at opposite corners of the tanks staying withing an inch of the tank bottom. They appear to be swimming pretty hard. I moved my return and circulating pump around to reduce the vortex effect I had going in the tank. One clown changed corners, but otherwise both resumed the frantic swimming pace within an inch of the bottom corners of the tank. Is this normal or do I need to change something up?
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