Brightwell Neophos 1 but not small enough to

but not small enough to escape filter bags

Superior filtration for Reef

Perfect Color Mixing

It is sized to allow full penetration by water

Feeding rings are a great idea for pretty much any tank that utilizes a type of overflow weir or wish for a repeatable place for finicky fish to find food

Brightwell Neophos 1 but not small enough toUsed in conjunction with MICROBACTER7 and REEF BIOFUEL or KATALYST, enables natural nitrogen uptake to take place in systems with inadequate phosphorus content, lowering ammonia, nitrite, and nitrate concentrations without the use of chemical filtration media and without resorting to polluting the system with organic material to raise the phosphorus content. Recommended for use by advanced reef aquarists maintaining ultra low nutrient content systems,