This may be relevant in another thread also. I had either ich or velvet breakout in my DT. Have all fish in QT. I had to remove all rock so I could get the fish. I was already in the process of building a new DT. I want to add the rock I just removed into the new build. I was just about to start building formations. Can I bleach/hydrogen peroxide the rock to eliminate the chance that parasites are in/on the rock to keep them from returning?