Six months ago I purchased this pump brand new for my future 120g which is now ready. A week ago I installed it as a return and I could not believe the noise that is coming out of it. It makes a constant grinding sound "rrrrrrr", vibration like. I made sure it does not touch anything but the bottom of the sump by the suction feet and is connected to a silicone tubing, so it cannot be from vibration. I read on the web that these pumps get loud when used as returns so I switched it with an old 1260.
Now the pump is installed as a feed pump for my GFO / Carbon / Bio Pellets reactors, set at the lowest setting. For my surprise it is even louder. It sounds like the impeller is grinding / rattling / out of ballance. It is under the cabinet and with the doors closed I can still hear it 10 feet away. For comparison I hear the pump clearly even when my two vortech mp40 pumps are at full power and we all know how loud they can be. I opened the pump and everything looks fine, it is completely clean as it has been used for like 9 days total. Maybe I am missing something, maybe something inside got detached? Any suggestions will be greatly appreciated. It is sad that a new pump from a reputable brand advertised as silent is at least 5 times more loud than a cheapo chinesse pump :deadhorse1:
Now the pump is installed as a feed pump for my GFO / Carbon / Bio Pellets reactors, set at the lowest setting. For my surprise it is even louder. It sounds like the impeller is grinding / rattling / out of ballance. It is under the cabinet and with the doors closed I can still hear it 10 feet away. For comparison I hear the pump clearly even when my two vortech mp40 pumps are at full power and we all know how loud they can be. I opened the pump and everything looks fine, it is completely clean as it has been used for like 9 days total. Maybe I am missing something, maybe something inside got detached? Any suggestions will be greatly appreciated. It is sad that a new pump from a reputable brand advertised as silent is at least 5 times more loud than a cheapo chinesse pump :deadhorse1:
