Check out the video of my clown above please. She's just about 7 years old now.
She's been swimming really close to the sand and there's points she'd just stop and lay on her tummy on the sand (rarely she'd fall to her side). There's one spot she'd prefer to just stop and lay there- rarely anywhere else but one spot only.
She still eats, she still chases after the hawkfish that she hates. She still acknowledges me when I get close to the tank. Her color looks good, I don't see anything off about her, she doesn't look bloated, no visible disease. It almost, almost, looks like she's struggling to swim upwards and tires her out. The end of the video where she lays the second time is her usual spot and her home. You can see her mate is concerned about her.
No new additions has been placed in the tank for over a year, I am ruling out parasite since all other fish looks great and active and no new addictions to bring any in.
All params are normal and good, nothing off with the testing.
Any ideas? What can I do for my girl? I've had her for just about 7 years now, I'd be sad if I lost her now.