Seachem Matrix Carbon - High Efficiency Spherical Carbon 250ml Freshwater Fish The heater takes on the

The heater takes on the classic "hang in the water" design

Extremely well ventilated

and all the essential fortified nutrients

- Kills fleas and ticks

Seachem Matrix Carbon - High Efficiency Spherical Carbon 250ml Freshwater Fish The heater takes on theMatrix is a high porosity biomedia that provides efficient biofiltration for the removal of nitrogenous waste. Matrix is a porous inorganic solid about 10 mm in diameter. Each liter of matrix provides as much surface (<162 m) as 40 liters of plastic balls! Plastic bio materials provide only external surface area, whereas matrix provides internal macroporous surface area. These macropores are ideally sized for the support of nitrifying and denitrifying