Just added 4 tiger barbs to my planted 20 gal tall. First time with barbs. They all went to a corner and are just chillin. Not showing any sign of disease and eating once a day. They have been like that for three days now, is this normal? Tank cycled for 6 weeks, nitrate 0, nitrite 0, pH 6.8, ammonia .10, temp 78F. should i add more in a week or so? No other fish in tank.Went to the lfs and they said ammonia was high and said to use AmQuel plus, but im a bit sketchy about adding it. Thanks for any help, great sight.