A Gravel vacuum is an important Device for retaining a clean up tank. After a while, debris accumulates from the gravel, affecting water good quality. A gravel vacuum, for instance Lee's Gravel Vacuum with Hose, facilitates efficient cleaning 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 , https://pearlaquatics.my/why-everyone-should-have-an-aquarium/