Fluval U-Series Aquarium Filters Size:U4 we prefer not to add

we prefer not to add any chemicals which could pollute the fish tank

Install batteries with correct polarity

waste excreted by livestock

guaranteeing exceptional quality

This bulb has the red and blue diodes in them which is very important for the longevity of your plants

Fluval U-Series Aquarium Filters Size:U4 we prefer not to addFluval U2, U3 & U4 Underwater Aquarium Filters 3 Stage Filtration Deliver powerful, multi stage filtration with the Fluval U Series Underwater Aquarium Filter, designed for freshwater and saltwater aquariums as well as reptile and turtle environments. Ideal as a primary filter for smaller tanks or a supplementary filter for larger aquariums, these internal filters provide reliable mechanical, chemical, and biological filtration in one sleek, space