ic, so if was to get anymore fish i would get tiger barbs again.
No, the point people have been trying to tell you is that at this point you really should not put in any more fish. Your tank is just too small.
The general rule is 1 inch of fish per gallon. You have 5 tiger barbs, 3 inches a piece when they are adult, and you have a 10 gallon tank.
5x3 = 15 > 10
I know the tank looks empty, but this is more for the health of your fish and for your ease of keeping the tank.
With lots of fish in there, if your fish happen to get a disease, it will spread very quickly. Lots of fish means lots of fish waste, and if your filter is only rated for a 10 gallon tank, it will be unable to filter the water effectively. You will have to do much more frequent water changes in order to keep the water clean for them.
Finally, and probably, most importantly, too many fish in too small a space will probably be stressful for the fish. Stress leads to weakened immune system. Weakened immune system means that the fish are more susceptible to disease, and then we're back to my first point, with lots of fish in there the disease will spread rapidly.
I am going to assume that you are new to the hobby, so please don't think me condescending when I say: Once you learn more about fishkeeping you can learn how to bend these rules. But, just starting out, that 1 inch per gallon rule is meant to keep your fish healthy. If you want to get more tiger barbs, you really, really, really need to get a bigger tank.
The question about water stats was very pertinent. Do you have tests for ammonia, nitrites? Do you know why having those tests are important? Do you understand cycling? If you don't, please don't feel bad, everyone was a beginner at one point, and the people on this forum are usually exceptionally helpful at making sure you understand almost any question you might have, so please ask away!