Review on Uxcell Hydroponic Bubble Release Diffuser by Andrea Miller

I have used these rocks in my 45 gallon aquarium and they work great. I like the fact that they aren't huge and wide, they are big and easy to fill with gravel. One rock lags a bit and doesn't release as many bubbles as the other but still works great and adds a nice view to the aquarium as well as oxygen for any fish I decide to buy. 3-4 weeks ago and they still work great.