I'm on board with the tank size for sure. I tried to keep a very small Foxface in my 45 until he got big enough to go in my main tank. All he did was freak out (the mottled black look :lol:) the whole time he was in there. After 3 days I was worried that I might lose him so I put him in the big tank.
After ten minutes he was swimming around like he owned the place. A 70 might not be big enough unless you could get one built that was long and narrow. And then you would have to start worrying about gas exchange with a smaller surface area.
Just my two cents :biggrin:

Hi, try installing a grounding probe for stray voltage. Voltage measuring in milliamps can cause stress among livestock. regards Ken

What is your calcium reading? You said you dose with purple up every 3-4 days. How much?

I'm not sure what my calcium levels are, I'll have to check when I get home.

The purple up bottle says one capful for every 50 gallons. no more than once per day.


I'm doing one capful every 3-4 days.

Could my pH be causing unecessary stress?

No, the tank is causing the stress. It's too small for the tang so it goes nuts which in turn makes all the other fish go on edge.

I have to agree, a 90g should be the absolute minimum for a yellow tang. I know you're a good guy so I hope you do the right thing and re-home the tang asap.

So I talked to my building manager, The most I can get in is a 70 gallon tank. The Tang is still small, and if I can get a nice long one, it should provide enough swimming room for the guy.

Thanks everyone for your help. Really appreciate your input!

70g is a pretty good size for now, keep in mind that your tang will grow like a pig and requires a ton of swimming room (5-6 feet if you can get it!).
Levi

Nexus it is obvious to me that you did not house a tang in such a small tank on purpose.
Please follow the advice of almost everyone and rehome the tang immediately.
It is suffering.

yes, that tang needs a new home NOW! not when you can afford an upgrade. Also, it WILL outgrow a 70g in about 6-8 months as well. Best thing is either take it back to the fish store, or sell/give to someone who has a large enough tank. I housed a Yellow Tang in my 45g corner tank for 4 months. He is a totally different fish now that he's in a 150g. They get bursts of speed and need room to run. You wouldn't house a racehorse on a city lot back yard, would you?