I have a SW-2 I my 5 gallon Fluval. I really like it except for the fact that it stops running every once in awhile. It's the rotor that somehow gets stuck. I have to force it to spin a couple times to get it unstuck. Then it works fine for a week or so. I have it on low flow setting and it's covered by a sponge to prevent my nems from getting shredded if they decide to roam around the tank. I inspect the motor once a month for routine cleaning but it's not that dirty. But obviously some buildup causes it to stop. It may not be a problem at higher speeds.
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