It is what it is. This is the tube that fitted my Fluval 306 user who was starting to turn green with algae. I was able to detach the pieces and put this one back in place and it works like a charm. The only downside to the product for me is the price. I can't pay more than $10 for a plastic tube but hey it works and I'm happy. There were no conversions or anything like that. I just removed the previous bar and put this one back.
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