If using the tap water (not a great idea
), make sure you mix up the saltwater at least 24 hrs ahead of time with a PH
and heater to ensure that the parameters have had time to stabalize. When setting up a QT "on the fly" it is better to use the main tanks water as it will be less stressful on the newly aquired fish than a new batch of water would. If you are planning on any future purchases, I would suggest leaving the QT running and allow it to stabalize on it's own.
If the tang has just started the rapid breathing after the water swap, I would suspect a drastic change in the ph
(not good). These kinds of changes must
be done very slowly so as not to shock the inhabitants. Due to the small size of the QT, you must think in smaller degrees to avoid drastic changes. Have you tested the ph
since the water change or was the 8.6 the new reading and are you sure the ammonia is not registering? If you have not done a water change, then ammonia would be suspect for sure.
In most cases, ph
will settle in a day or two on it's own so in future do not use the tap water immediately from the tap but rather let is sit for a few hours to allow the ph
come down. Even better would be to get an RO
unit but in it's absence, you could fill a 5 gal
bucket and have it on hand for top ups and such. Use a PH
to keep the water moving as well. I would also get yourself a more accurate ph
test if your having trouble with this one. What brand is it?