I just got this a few days ago and it's working fine so far. I have a Fluval Spec tank which is smaller so it may have been too difficult to wire it up. But thanks to all the little things that came with it, I finally figured it out. I think the directions weren't very good, but there are so many parts to play around with, so I kept going like this until it started spinning. It looks like you have to put it in the water first before spinning the stick on it, or it might just fall through. Despite the installation issues, I still gave it 5 stars because Fluval's version that looks the same costs more than double the price.
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