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  1. Unsure of overflow size

    Beginner Saltwater Aquariums
    I will be ordering my overflow and return kit from glass-holes.com very soon. They offer quite a few different overflows and I am unsure of which one to get. I think I would need the 700 GPH for a 40 gallon breeder, correct? As far as the return, I would go with the 3/4 inch return. Correct me...
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