sick oto!

Hi, I'm not sure if my otocinclus is dying or not. I moved him from a 30 gallon tank that had 5 goldfish to a 135 gallon tank with some catfish, the catfish seem to be doing fine, but my otocinclus has been acting weird as of today, he's just lying down on a rock and not moving much. He has always had this light reddish color around his gills, but it seems a bit darker.

We're having a heat wave right now, and it's over 36 degrees (celsius) outside. I have turned off the heater in the tank because it was up to 80 degrees (F).

He's been in the tank for over a week now, and he's just suddenly acting like this.

Does anyone know what's wrong with him?

Wow that's pretty hot, and I was worried the heat was getting to it =_= at least it's not that ^^ thanks

The red color doesn't look like blood, it's a light reddish color. I put two air stones in the tank, turned off the lights in the room, so hopefully that'll help it out.

Every time I put in a cucumber in there the oto doesn't seem to eat it. Am I supposed to boil the cucumber?

I just scared myself, went to go check on it and it was lying weirdly on a plant that was stuck on a filter intake, thought it was dying on it, but I think it just likes being on it. After I moved the plant around a bit to see if it was dying, he just kept moving around to stick onto the plant.

My oto DID have some friends, but I bought a bad batch of oto from a pet shop, and they died. One of the lasted for around 9 days, it schooled with my oto too, but just died two days ago. Talked to the pet shop about it, and they said that that batch kept dying too, so I hope it's not my tank that's killing them.

Well, I checked up on him this morning, and he looks worse than before The reddish tinge that is around his gill/head area is now starting to show up around his abdomen...the last oto that died also had this reddish tinge show up around his abdomen a few hours before he died

I took some pictures with my cell phone camera to help illustrate what he looks like:





The reddish tinge does not show up that well in these photos, but they are definitely more pronounced in real life. I wasnt able to take a picture of him when he was on the glass, as that would show the red areas more visibly...he has been sitting on the rock for a while now He occasionally will dart around to chase a few neon tetras or briefly latch on to a plant, but will then return to the rock.

As my last oto exhibited these same signs before he died, I'm afraid this one will die too