Makes coarse bubbles
They are an excellent aeration device for use in under gravel filters, corner filters
Discard-A-Stones are disposable air diffusers with reusable inserts for attaching airline

Technical Details

Product Details

Product Dimensions

Package Dimensions
Width : 4 inch
Height : 1.7 inch
Length : 8.5 inch

Item Weight: 1.6 ounce (View shipping rates and policies)
Shipping Weight: 3.2 ounce (View shipping rates and policies)

ASIN : B0002APU6W