Hi, I am new to fish tanks. My son is 4 and he decided he wanted fish, as did my husband and I. We got a 10 g tank at a garage sale, and checked for leaks, and i got rid of their old rocks and got new everything. We got a Aqua-Tech filter and a air pump, some decor and all that. I was wondering if there was anything specific I need to do before adding fish? I know I have to let the water get to normal temp and all that, but chemical wise? I do not know anything about that stuff. Also about how many fish can we put into a 10g? Any suggestions or help ideas would be wonderful at this point, cuz i am a little lost. Thanks alot!