The product works, not much else to say.
Works, what more is there to say.
These things are great. They make it so easy to clean algae off the glass. I tried other scrubbers, but they seem a bit harder to use. The only down side is you have to stick your arm in the tank. You can't win them all though.
They work as well as ones costing a lot more!
Absolutely a great sponge! Was starting to get that pesky green spot algae on my tank and this got it off perfectly.