Safe Ammonia level??

In useing an Ammonia NH3/NH4+ Test Kit, what should the safe level be? If it is too high what product can I use to lower it in a 2.5 gallon tank? Or should I just do the small water changes to lower it?
The test kit is like this one. http://www.petsmart.com/product/index.jsp? productId=2754002

I have a couple of very similar test kits, and they seem to work fine. The only acceptable level of ammonia as measured by those kits is zero. A series of partial water changes and a conservative feeding schedule should lower the ammonia to zero, provided your 2.5 gallon tank is not over crowded. Since you are dealing with a relatively small volume of water, it can't handle very much waste from food, fish or plants. For right now, you could change about 20 percent of the water every day for a few days, then go to a once a week schedule. If you have left over food on the bottom of the tank, you can suck it up with a dedicated turkey baster.

When I did the test the level looked to be 0.50 almost leaning over to the 1.0.

I only have my betta (Romeo) in the tank and feed him once a day.
Usually 3 betta pellets one at a time making sure he eats them. Sometimes i do a small amount of flakes for a change up or a couple freeze dried blood worms.

I just did a water change you recommended.
Am I correct that I should I test each day and do the small water change till I get a test result of 0 and then go to once a week test and change?

You could test for ammonia after three days of partial water changes. If it's not zero, you could do some more daily, partial water changes, check ammonia again, etc., until it's all gone. It probably would not hurt to do a 25 or 30 percent water change, but larger water changes might change water parameters too rapidly. The feeding schedule is reasonable, and the aquarium is not over crowded, so the ammonia problem should clear up pretty soon. Have you thought about feeding the Betta some frozen food like brine shrimp or blood worms? After the ammonia falls to zero, the frozen food would be a good supplement. Please keep us posted.

Don't forget to thaw the frozen food before putting it in the aquarium.

I use a little cup, and take a bit of water out of the aquarium,thaw the food in it, then dump it back into the aquarium.

The small water changes should get rid of your ammonia.

Good Luck!