With that ball valve, are you using the bubble difuser? Doesn't look like it so I was not sure.
By the way I have a 220 and a 125 going on two different tanks. They seem to work very well and I have not had any leaks. Only comments I would have is:
1. First night with the 220 model I almost burned my house down. (my error. The valve is finicky and water was actually coming out of the air valve at the top of the skimmer due to back pressure I assume. I fixed this by just attaching an air hose and although it is pointed into the tank it is out of the water. Good news is I now use GFIs and the skimmer works well now.
2. I changed out the sponge at the bottom of the diffuser to something a bit more porous. After a night the white sponge at the bottom seemed to be causing more back pressure in the output. Luckily this time I had the airline tube on there.
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