hey i added a bubble strip in my tank will thishurt anything the reason is i kept getting like a film or like sand floating up top of the water. i have a fluval 405 which keeps the water pretty clear. i just wanted to add the bubbles for more water circulation. i was told at the pet store wouldnt hurt anything. i like the look of it now. not the plain look at the rocks and the 4 fish. i have a dragon goby that will not leave the sand alone he keeps digging caves under the rocks. cool fish but man does he have stuff tore up.