JW Pet Company Anchorstone Sand Airstone Aquarium Accessory
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- Produces constant bubble flow
- Adds oxygen to aquariums
- Patented anchor feet no suction cups
- Securely place anywhere in your aquarium
- 12-Inch anchorstone
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The super porous surface of the Anchorstone Sand Airstone 12-inch by JW Aquatics produces a constant bubble flow, which adds much needed oxygen to aquariums for healthy fish. With its patented anchor feet, the Anchorstone can be securely placed anywhere in the aquarium without the use of suction cups. The Anchorstone is also wider than other air stones, which results in an abundant wall of bubbles.
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Con #1: Product description says it can be placed anywhere in the tank. Not true -- it must be half-buried horizontally in order to reliably remain in place.
Con #2: The airline tubing connector exits inline from the airstone. With the airstone place horizontally, this means that the tubing must be bent into a right angle to reach the top of the aquarium. This has these disadvantages: unsightly, difficult to keep in place, prone to kink, prevents corner placement. Why not have a right-angle connector so that the airline tubing could take a straight path to the surface? Although one could argue that a large radius tubing turn causes less of a pressure drop than a right-angle connector, that doesn't begin to override the disadvantages.
It does exactly what I wanted it to do. It has a nice curtain of bubbles along the center of the back of my tank. I don't have it buried in the gravel because it is already hidden by rock and driftwood, and it is heavy enough to stay on the bottom. Between this air stone and the air stones in the undergravel filter, a really good surface current is created. That circulates the water from back to front along the surface and down the front of the tank. My danios love swimming against the flow.
Originally, I had this stone as one of two air stones off the same airline - DON'T do that. You will be disappointed with the bubbles from both stones. If you do have more than one stone, be sure to have an air pump that can handle it and a multi-valve air controller so you can control the amount of air through the stone.