You haven't clarified how new this system is
I suggest you read up on the nitrogen cycle on the web so you have a better understanding what's going on. You've led me to believe you don't understand it with your initial comment about having .5 ammonia
So ... I should have been a bit clearer with my comment about your ammonia
0.5 isn't
bad but it's getting there. It just means that you are going through a cycle. This can happen any time you transfer stuff between tanks.
You should initially test for all 3 and keep note of the results
Ammonia NH3
Nitrites NO2
Nitrates NO3
Keep an eye on your NH3 and if it goes over, say, 1.0, do a 10 or 20% waterchange. And test your ammo more than once a day.
Don't change more than 75% water over a 24 hour period !!!
Keep an eye on your ammonia and, when it drops and goes away, then your NO2 will be most likely in the mid-point of it's cycle. Eventually your NO3 will take over and you're finished with the initial worrying.
As I stated at first, read up and understand what's going on !!!!!!
You should also be adding some air to your tank right now as the oxygen is probably low. Either an air pump, or some kind of surface agitation with the top open to the room. I'm not saying expose jumping fish, but you have to let the surface air exchange happen