Como 2 Pcs Fish Tank Green Plastic End 4" Blue Air Stone Bar

I ordered 2 of these air stones, and they arrived in a few weeks, directly from China. They worked well when the air volume is great, and the size of the bubbles is insignificant, such as when circulation and aerating water in a 5 gallon bucket. In the tank, however, where lover volumes of air might be used, the size of the bubbles nearest the inlet are "larger than most air stones" and few bubbles emit from the end length of the stone. To make bubbles come out of the full length of the stone, air volume must be increased significantly. If you are looking for medium to fine size bubbles that come out evenly over the whole length of the stone, this not the one for you. This item only allows for large bubbles and uneven bubble distribution, and cannot produce small bubbles. Both of the 2 stones functioned identically and might not be the best choice for bubble aesthetics in the aquarium.

This is prect for that small or med fish tank its not in the way like the bigger ones are this just the right size for a 25 gallon fish tank thank you

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