I think that overall this is a really good product, my mom worked at a pet store and sold these. We kept some and use them everywhere. Ponds to fish bowls. Awesome Product.

Pros: :)

Cons: :)

I have one of these stones that I keep in the porch so when I bring my minnows in I can keep the oxygen bubbles going and keep the fish alive till I go fishing the next day

Pros: keeps the minnows alive

Cons: none

When it comes to my fish, I try to get products that help during hurricanes. I have battery powered pump, so I use a connector to have more oxygen pumped into my 90 gal..

Pros: easy to use

Cons: none

I dont care for these much. I suggest the regular green ones. They are easier to clean and dont leave the water as dirty. This seems to push the dirt around in the water.

Pros: works

Cons: impossible to clean

I like these, they add a lot of bubbles and life to the tank. I have not had problems with the air holes getting clogged. They seem to last as long as the other kind.

Pros: add life to tank, large bubbles

Cons: none