Review on 🐠 Pawfly ASR100 Aquarium Air Stone Bubble Diffuser - 4 inch Ball Shape Airstones by Kristi Martinez

The way these sets are packaged looks impressively silly. You stack them on top of each other. This meant mine arrived with the metal entrance of one stone built into the base of another. Obviously hollow domes don't work with a giant hole in them. Now that I am packing late I will definitely avoid this manufacturer in the future. I only gave them two stars because they can actually work quite well, but I'll never know.