my fish look like they are gasping please help

GoSixers

New member
I just put a bit of food in the tank and they are barley even chasing after the food. I haven't fed them in a few days cause of a nitrate issue. What is going on? They look like they aren't moving much and are gasping.

The temp has been around 77, and I just replaced my aquaclear 20 with a korlia 2. The coral beauty just died I had to stop typing to pull him out. I’ve done about 4 water changes in the last week because my nitrates have been high, so I doubt it would be oxygenation related. I noticed my little chromi has what looks like a red round bite mark on his side but he is the only fish besides my mandarin that seems normal. The coral beauty had slight damage to his fin and they were always perfect before. The only other fish in the tank is a large domino damsel that got bossed around every once in a while by the coral beauty. He is hiding in the back of the tank behind the rocks and looks exhausted too. He is the one that would normally show signs of being bullied by the beauty. Maybe he had enough? I have not been feeding them much the past 2 weeks trying to get nitrates down.

please help.
 
How big is the tank ... how long has it been setup ... were the fish QT'd ... any other fish problems in the past?
 
Thanks everybody who helped!

I’m pretty sure I figured out the problem. I thought the skimmer just broke in and was why it wasn’t making as wet skimate as before; nope. I took the skimmer out and the air hose on my solanas stock skimmer must have been just barely around the nipple basically making the skimmer useless. It caused a major nitrate problem as well as starving my fish of oxygen.

When I was originally putting the skimmer together I was thinking to myself, this is the worst design ever. The tube barely even stays on to begin with. I will put a fastener on it ASAP. I can’t believe they would design something so crucial so poorly. A 5 cent zip tie could save thousands of dollars of life. The ridiculous thing is I never even messed with the skimmer. The hose just eventually started coming off the nipple.
 
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