Sera Replacement Stainless Steel Blades 5 Pack glass aquarium They are an excellent aeration

They are an excellent aeration device for use in under gravel filters

riser brackets

Over a period of several months

and will also be an ideal substrate for the settlement of strains of beneficial nitrifying bacteria

Maintaining 400 ppm potassium prevents coral color loss

Sera Replacement Stainless Steel Blades 5 Pack glass aquarium They are an excellent aerationGlass cleaner with stainless steel blade allows for best possible cleaning Even very tenacious algae are removed from the aquarium glass by means of the stainless steel blade. Changing the blades is very easy by pushing a button within the handle. The blade is firmly seated in the handle. This 5 pack will fit the Sera glass cleaner with stainless blades