SMALL-SIZED POROUS SUBSTRATE, STAND FOR SETTING THE SAME, STRUCTURE HAVING BUILT-IN SMALL-SIZED POROUS SUBSTRATE, AND METHOD FOR CREATING SEAWEED BED
PROBLEM TO BE SOLVED: To provide a small-sized porous substrate allowing a fisherman or an ordinary person to easily transport with a fishing boat to a place including adhesion requirements such as depth of water, illumination and wave strike in a mature stage of seaweed so as to perform substrate c...
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