I've had this canister filter for a few months now and didn't have issues like this before. What's happening is that the water level inside the filter itself will start to drop to the point where I can hear lots of trickling.
I know this isn't supposed to be the case so I've been opening a latch to allow the air to escape and water to fill back up. It'll be fine for maybe 20 minutes or so but when I come back the trickling/low water level is back.
API customer service doesn't open until Monday and of course this would happen on a Friday
Any advice would be greatly appreciated!