My prediction is that the USA will strike trade deals with Vietnam, Thailand, and Indonesia (sources for a lot of manufacturing) that will (continue) to provide cheaper equipment for the fish hobby in the USA. My guess is there will be about a year of disruption as supply chains from China to the USA get unwound and replaced with those from the other SEAsian countries. Where it gets interesting is determining who will own the manufacturing in these SEAsian countries. Will the USA accept Chinese owned manufacturing just moving across the border from China to Vietnam to get around the tariffs on China? A lot of such manufacturing has already moved to Vietnam from China over the last few years for just that reason. I'm sure the trade deals to come between the USA and various countries will be very complicated. In a "worst case" scenario and tariffs stay in place against all Asian manufacturing, then I'd guess we are looking at a bit longer period of time of disruption as people set up manufacturing in the USA to meet demand. Aside from reef keeping, our hobby is not really that high tech - mechanical pumps, air pumps, LED lights, heaters, glass and acrylic - it's not rocket science. As a case study, think of Aquarium Coop. I would bet a dollar that the owner(s) are already looking to manufacture their product lines in the USA. I see a lot of room for other entrepreneurs to do the same.