The idea was great but the execution was poor. The 375 GPH pump I used pushed the internal water jet out of position so it wouldn't disturb the media. Every few days I would open up the device and squeeze the entire inner tube tightly to keep the device working properly. I'm not sure if I just had a bad block. Finally back to Amazon. I travel a lot for work, if the biopellets stuck together, they would explode the whole tank.
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