Brightwell Aquatics - REEF BIOFUEL.. Helps maintain a balanced nutrient-limited marine. aquarium by enabling the hobbyist to enhance the. rate of microbial growth and reproduction, increasing. the rate of phosphate-reduction and denitrification;. this is of particular benefit in heavily-stocked, well-fed. reef aquaria.. Replaces "vodka method" of microbial activity-. enhancement with a completely safe and. biologically-sound, non-flammable alternative to using. vodka or ethanol.. Indirectly benefits corals and other suspension-. feeding invertebrates by encouraging reproduction. of bacterioplankton (an important food source for. suspension-feeding invertebrates).. Encourages polyp-expansion in all corals.. May be used to help expedite biological filtration in. new set-ups.. Formulated by a marine scientist.Liquid. 2-L