Well that was a first. Over the last week I've watched the flow rate of my uv slowly drop. Yesterday I turned off the uv and my pump with the intention of cleaning the pump. Since it's hard plumbed into my display it became an addition siphon drain. I come home at lunch and notice my box fish...
You need a 3/4 slip x 3/4 barb fitting and a 3/4 female x 3/4 barb fitting. Cut the blue pipe where I circled above. Glue the slip fitting. Put the other fitting on the pump and the use silicone or vinyl tubing of 3/4 i.d. to connect the two.