GoPlus No Suction

How do I break the union?? I can't even begin to understand what that means Is that the cap that releases air when the jets are running?

How do you unclog internally?

Hi so I really think these little go plus hot tubs are really cool because who can move them from one area to the next like in a day nobody okay so here's my problem I bought it second hand yes but the guy only used it a few times okay...so I get home, fill it up, it's working great...but I just emptied it cuz I was ready for a clean I don't have the owner's manual but now I filled it back up and my pump's not working, I don't get any suction at all, my heaters working but I don't want to run the heater without the pump running.. you dig?? So when I call these hot tubs places Cal spa Leslie's some springs place they all kind of chuckle when I say it's inflatable, like I have a fake car or something you know and they say something to the regards of oh I have no idea I don't know what you're talking about like I'm less of a hot tubber than they are..is there a way to get my suction back ..airlock?; Ugggg HELP !!!! um any suggestions?