i did add a peice of fake coral that i bought when i first bought the tank i had it under the tank and thought i would ad it to the tank i wasnt thinking when i put it in and didnt wash it off do you think that could be it
please help i have had my tank set up for 4 months everything has been fine i woke this morning and all my fish were dead can someone please tell me what might have went wrong also all my test i did were right on the money pat