This creation is a kind of structural improvement of Shui nationality device for diffusion of carbon dioxide,Principal series includes a major trough body,Upper part is that air drain and its underpart are meter bubble slot on one,Have between air drain and meter bubble slot on this one every portion,It should be equipped with an axis hole and several stomatas every portion,Air drain and meter bubble slot inner face are equipped with concave ring mouth on this,Respectively for merging leak-stopping cushion rubber and potsherd,Bulb apparatus is counted,Wherein,Axis hole every portion is planted for the jack-post of checking head,The checking head can be non-return to each stomata； Also,The axis hole for counting slot under bulb apparatus is planted for the jack-post of checking head,The checking head can be non-return to each stomata,Separately there are a upper bolt and lower air drain system difference bolt to close air drain and meter bubble slot on what major trough body both ends,A connector for entering gas is equipped at lower air drain one,Descend the bottom of air drain equipped with a socket for forming one in conjunction with a carbon dioxide detector again,Reach the structural efficacy person not taken up space.本創作為一種水族二氧化碳擴散器之結構改良，主係包括有一主槽體，其上部為一上氣槽而其下部為計泡槽，該上氣槽與計泡槽間有一隔部，該隔部設有一軸孔及數個氣孔，該上氣槽與計泡槽內面均設有凹環口，分別可供置入止漏膠圈及陶瓷片、計泡裝置，其中，隔部之軸孔可供止逆頭之軸柱插置，該止逆頭可對各氣孔止逆；又，計泡裝置之下槽之軸孔供止逆頭之軸柱插置，該止逆頭可對各氣孔止逆，另有一上栓體與下氣槽係分別栓合於主槽體兩端之上氣槽與計泡槽，下氣槽一位處設有一入氣之接頭，又下氣槽之底部設有一插口供結合一二氧化碳偵測器形成一體，達到不佔空間之結構功效者。
