Once again there is lots of conflicting thoughts on whether to aerate the raft tanks. These are in my fish tanks. I now have the 8" ones. Only one in each 300 gallon tank. You can see the video of how well it works. I will post where I got them.
Where in your system is this disc located? I was advised to put many 4" aeration disks in each of the three raft tanks (4x40') and then someone told me that they aren't needed.
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