Maybe superfish filters? I have one and you can also turn the flow down on it another of mine is a marina it has a sponge and I use it on my shrimp tank so no one gets sucked up!
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70 gallon elephant nose tank, Gonzo the elephant nose and friends!
30gallon borara merah and brigittae green, red longfin bristlenose, shrimp, ninja, taiwan,bamboo, and snails.