[I have 2 of these that I got talked into buying many years ago. They worked ok for my FW tanks but certainly not the greatest. Can they be made into HOB refugium? I would need to block the one opening that I've marked. The bioballs & sponges area would be where I'd put sand. Should I not even bother with the airstone/chamber for skimming?
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Size is 24"L x 4"D x 16"H.]
Size is 24"L x 4"D x 16"H.]