C ClaytonC New member Feb 7, 2009 #1 one day i looked at my freshwater fish tank and i saw a floating black bubble thing. i touched it and took it out and felt it and it as pretty hard. i have no idea wat it is should i keep it in? does anyone know wat it could be?
one day i looked at my freshwater fish tank and i saw a floating black bubble thing. i touched it and took it out and felt it and it as pretty hard. i have no idea wat it is should i keep it in? does anyone know wat it could be?