That's really overstocked. Go and get the test kit and report the readings for pH, ammonia, nitrite, and nitrates. I suggest this one: http://www.bigalsonline.com/catalog/product.xml?product_id=19383;category_id=3111;pcid1=3233;pcid2=
Be sure to get liquid and not test strips.
Also do some water changes right now just in case. Try one 75% change. And every week do a 50% one. This will help to keep all of your levels in balance.
Be sure to get liquid and not test strips.
Also do some water changes right now just in case. Try one 75% change. And every week do a 50% one. This will help to keep all of your levels in balance.