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Fluval U3 Underwater Filter provides complete and efficient 3-stage filtration
Provides comfort to your aquatic pets
A scientifically blended nutrient mix specifically for larger carnivorous fish who tend to avoid feeding from the top of the aquarium
Carefully selected ingredients offer rapid growth without losing desirable form
FritzZyme 9 Saltwater - 32 oz Saltwater Testing Fluval U3 Underwater Filter providesFritzZyme 9 contains saltwater specific strains of live nitrifying bacteria proven to reduce fish loss due to toxic levels of ammonia and nitrite. Nitrifying bacteria can take weeks to naturally establish colonies in new aquariums while ammonia and nitrite can reach lethal levels in only a few days. FritzZyme9 provides the proper balance of bacteria proven to rapidly seed biofilters, greatly reducing the natural cycle time allowing for safe, immediate
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