“We paid over $60 for three (what look like normal river) rocks! We haven't seen any change in the grass yet but they do apparently take a while to start working. We'll just have to wait and see ...”
“Dog Rocks seem to work. It's initially hard to tell as they take so long to start working and you have replace every 2nd month. I purchased the small bag and the largest bag and received more rocks in the smaller bag, so was surprised about that.”
