Need hospital tank asap

I need small 10gallon or so quarantine tank asap. I have a sick clown that hasn't eaten in 4 days and has white stringy poo hanging from him. Other clown and all corals are great so want to qt this guy asap.

Problem is I go outtatown in the morn and have a friend taking care of my tank so want to set up hospital tank tonite to treat fish and in case he doesn't make it don't want amonia spike to hurt everything else.

Anybody have a small, cheap tank to let go that I could set up tonite... Or have alternative ideas of what to do or try? Horrible timing I kno!!!

 

I'm in des moines by merle hay. What all needs to be in it to function properly? Have a spare heater and just cheap old air pump. Ps thanks in advance! Everybody here is so helpful and it's appreciated ALOT!!!

 

I've tried feeding everything under the sun. He use to eat out of my hand so he is def Ill. Last time he ate was Saturday. He hides down in the corner all day just hovering above substrate. No visible parasites on body, eyes don't look cloudy. No fish picking on him that I've seen. He went from begging for food all day and eating anything I put in to this. I'm stumped.

 

I've tried feeding everything under the sun. He use to eat out of my hand so he is def Ill. Last time he ate was Saturday. He hides down in the corner all day just hovering above substrate. No visible parasites on body, eyes don't look cloudy. No fish picking on him that I've seen. He went from begging for food all day and eating anything I put in to this. I'm stumped.

 

Is there any non copper meds or coral safe stuff, that actually works, to add rite to tank or is that just a BAD idea!?!

 

I decided against the qt tank just for the simple fact I am leaving, as you said. Checked all param a bit ago…
Ammonia 0
Nitrite 0
Nitrate less than 5, almost untraceable
Ph 8.1
Salinity 1.023
Temp 77.2 now but up to 78.8 mid day

Also checked phosphate which are barely traceable, calcium at about 400ppm. I don’t know what type of impact those would have on a fish but checked just to be safe. Also have one other clown and a 6 line wrasse in there and are both very happy/healthy. The clown that is sick, or acting weird use to eat out of my hand but now just turns away at all I put in there.

I did 20% water change an hour ago also. What do you suggest? I told the guy watching my house to just keep an eye on him.

Here is the things I did before I noticed the change….. Last Friday I did 25% w/c, temp stayed within 1 degree and salinity didn’t change. The Thursday right before I added purigen and chemi-pure elite and eliminated the carbon/stock filter. Then Sunday is when the eating stopped. Do you think the added chemicals could affect him?

Thanks for the response and help.