Fluid Fusion With Manuel Velazquez Fluid Fusion is an aqua interval training workout designed to maximize your benefits by using the unique properties of water. To access this content, you must purchase Fluid Fusion, OnDemand Monthly Subscription Payment Plan, OnDemand Annual Subscription, OnDemand Monthly Subscription, OnDemand 6-Month Subscription or OnDemand 2 Year Subscription or log in if you are a member.