EasyPro Bio-Balls Biological Filter Media Size:1 Cubic Foot (~600 Count) which means that they are

which means that they are electronically controllable

If you have a bottom drain

based on the elite Koi breeders of Niigata

With the increasing popularity of the AlphaONE filter

It works in conjunction with Bio-Pure Formula F-50

EasyPro Bio-Balls Biological Filter Media Size:1 Cubic Foot (~600 Count) which means that they areEasyPro Bio Balls are a great, plastic biological media that will not compact like other soft media, reduces channeling of water. They can be used in all types of filters, and can be used loose or put in mesh bags for easy removal and cleaning. 1. 5" in diameter Approximately 660 pieces per cubic foot SKU Description BB05 200 Count with Mesh Bag BB15 1 Cubic Foot (Approximately 600 Bio Balls)