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32 Gallon Biocube Cutouts??

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What is the purpose of these cutouts in picture?


Also would it be okay if I covered those up to insure all water passes though the first chamber?


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Dumb manufactures design.  Possibly "idiot" holes, just in case water is blocked form chamber one it wouldn't starve the pump.  Coralife doesn't even have a good answer.


Cover them up.

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