[daniella3d]

Here is what they replied:

"Thank you for contacting us. The material you see in your bottle of Reef BioFuel is the result of slight microbial action in the product; the product is completely safe to use in your aquarium, and the material itself is also completely safe. Should you have additional questions, please feel free to direct them to my attention. Thank you for your interest in Brightwell Aquatics; I sincerely appreciate it. Have a pleasant day.

Kindest regards,

Chris Brightwell"



I can't help to wonder why there is this stuff in some bottle and not in most. I think I am going to switch to something else.