Join Date: Jun 2014
Location: Cape Coral, Florida
When you say priming, you are talking about the filter itself, or the skimmer? The filter is a bit hard to prime, but I'm going to assume you have it flowing and mean the skimmer.
I have four SunSuns and at first was excited with the skimmer as I thought it might take away some surface scum, but I quickly decided they are worthless. There are two issues - the first is they just don't work well, they either float too high or low, suck too much or too little water, and/or make a lot of noise.
But the bigger issue is oddly that they are at the wrong end of the tank, depending on what you do about flow. I prefer that the outflow be adjacent to the intake, the water moves across the surface, hits the end (or side) of the tank and descends, and returns diffused across the bottom flowing in the whole tank.
If you put the intake there with the skimmer, all the scum is at the far end pilled up against where the water hits the far end. If you put the intake instead at the far end, then the water basically only flows across the surface, and there's no deep current to keep the bottom circulated.
I just gave up -- got a but more surface agitation to keep the scum down, and in the rare occasions it gets enough to bother me I drop a paper towel right on the surface for a couple seconds, and gently remove it -- most will come up. Repeat a couple times. but I maybe do that once every couple months -- agitation will take care of scum as well as a skimmer.