My variable platy dropped about 20 first time (only 3 of which I still have), then subsequently less as her sperm store ran out I suppose. It depends on the size of the fish and their, ahem, activities I think.
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40L planted - 1 (opaline?) gourami
160L planted - 9 harlequin rasboras, 3 platys, 3 swordtails, 1 guppy
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