So i was using my extra air pump in the pond and one of the air stones and tubes came detached and is now at the bottom of the pond. That was the air pump i was using when the top 40 had the ranchus in it but now the ranchus are in the bottom 40 and the electric blues are in the top one. I have an aquaclear 70 and it is filled up so it is not making much noise. Do i need an air pump?