Theoretically I guess that you could but...I would highly recommend against it. I would break down the entire tank and wash everything in a solution of vinegar diluted with water. The acidic vinegar will kill most organisms and help to break up and hardwater and mineral deposits. Be sure not to use any soap of any kind. Have you ever dosed any copper based medications in the tank before? What kind of substrate do you currently have in your tank? With seahorses you will likely want some sort of a sand bed. Deep sand beds will help in providing anaerobic bacteria a place to colonize and process nitrates. What else do you plan to keep in the tank besides seahorses? Have you researched the different types of filtration methods? Do you plan to run a sump? How big is the tank? A skimmer is also an important piece of equipment that should be on your list of things to get. HTH!
