A Gravel vacuum is an important Software for keeping a clear tank. As time passes, particles accumulates in the gravel, affecting water quality. A gravel vacuum, such as Lee's Gravel Vacuum with Hose, facilitates economical cleaning without the need of 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/how-to-install-a-discus-aquarium-setup/