I have a feeling that the problem is internal in the head. I renewed the main seals three months ago and they look perfect. I shall use silicone spray on the main seal but I am talking about a steady trickle of water from from the top corners. Thanks for responding.
Hi I am new to this forum. For man years I have kept tropic fish and for the last 15 or so I have mainly kept Milawi cichlids. I have a 5 ft tank with an Eheim 2178 pro 3e 600T filter and this one is eight years old. In the last three months live changed the media and renewed the seals and...