pictus looking rough

I already flushed him oops he had a white slimey coat it looked like on him and was breathing fast he was swimming on the surface and floating down and then back up and then sink he was swimming straight up for the longest. It was odd.

It's a 29 gallon with an eclipse hood and a wardley sandman filter. I just recently heard of water changes. Never did one. It's been setup for like a year now. I got my water tested yesterday and my nitrites and nitrates were high. my ph was 8 as well.
 
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