We have an arbrux floating surface aerator
It's been working fine since we moved in. Last night we turned it on like always it was running fine. Tbis morning we woke up to it barely rippling. We turned it off and pulled it out. It's clean. Nothing blocking the pump. But when we put it back in and turned it on it's getting "sucked down". It works great like normal for a few seconds and then it's getting sucked Dow. So it still is pushing the same amount of water just from a deeper depth so it's barely rippling the water. As soon as you turn it off it pops back up to the surface. I have no idea what is causing this issue. We raked underneath it and there doesn't seem to be any algae or debris that would suck it down. Any ideas?