A white soft pad that you can hold in your hand and clean the underside lip of a tank. I have a rounded tank that has a 2" fixed cover that stays wet and grows algae. Cleaners with handles cannot reach up to clean so this works just right.
This little sponge worked great for me. I stuck a 1/4" dowel in mine so I could reach every corner of my 55 gallon tank.
This is a pretty heavy duty sponge and does a great job of getting the algae off my glass.
This little pad works really good on the green spot algae on the front glass of my tank. It pretty much wiped right off with out much effort.. Worked better then I thought it would. Fits right in your hand perfectly too.