They don't exactly create 'flow' but they do stir the water and create movement. My predicament is that i have a cylinder tank and nowhere to really install a powerhead. Are there any other disadvantages to having an airstone in a saltwater tank?
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80g Cylinder Reef tank established Nov/07
2 black clowns, Rose BTA, Fox Face, 2 scooter blennies, Yellow tang, cleaner shrimp, sand sifting star, blue regal tang
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