I haven't seen those "hose clamps" here, but that's no surprise!
But, those...I don't now if I have the right name, check valves (shoot, or is that the name of the valve you put on to stop the water from flowing back, darn)??? That sit on the back of the tank and allow you to attach more than one hose can't they be used. Although, how do you know if your restricting the air too much and causing damage to your air pump?