A Gravel Vacuum is an important Device for retaining a thoroughly clean tank. With time, debris accumulates from the gravel, affecting h2o high quality. A gravel vacuum, such as Lee's Gravel Vacuum with Hose, facilitates economical cleansing with no disturbing your fish and decorations. 本回答被题主选为最佳回答 , 对您是否有帮助呢? 本回答被专家选为最佳回答 , 对您是否有帮助呢? https://pearlaquatics.my/product/aq-anti-internal-bacteria-100ml/