Fluval FX4/FX5/FX6 Foam Insert 3 Pack cavern kit Slowly lower the pH of

Slowly lower the pH of your pond water to make it more acidic using API Pond pH DOWN

: AAUV9W (EG442 & FRF-UV9W)

sold separately

and hang on back filters

Fluval FX4/FX5/FX6 Foam Insert 3 Pack cavern kit Slowly lower the pH ofDesigned specifically for Fluval FX4, FX5 and FX6 canister filters, the FX4 5 6 Foam Pads capture large particles and debris for effective mechanical filtration. Mechanical filter media Custom fit to prevent debris bypass Ideal pore size allows efficient water flow and longer media lifespan Enhances the biological filtration process For use in freshwater or saltwater aquariums Convenient 3 pack format