Fluval "U" Underwater Filter Size:"U3" The heater includes many practical

The heater includes many practical features for easy use

Cut Out: 6 3/8" x 10 1/8"

Refill Power Cartridges available (A134

The sand has been sifted to remove impurities and to obtain a homogenous sand grain size

1st ingredient is real chicken

Fluval "U" Underwater Filter Size:"U3" The heater includes many practicalFluval underwater filters with three stage filtration are ideal for use in fresh, marine or reptile environments. Stage 1 foam removes large particles. Stage 2 poly carbon cartridge traps fine debris, improves water clarity and removes impurities. Stage 3 BIOMAX provides optimal biological filtration efficiency. For aquariums, terrariums and turtle tanks Ideal supplemental or stand alone filter, or for installations where external filtration is not