I replaced the sand in my tank.Does anyone have a suggestion about cleaning the old sand as it is very dirty?
Rinse in tap water, put a bit in a old salt bucket and rinsed until clean. Then do the next batch. Rinse one final time with RO water, and then with old tank water from water change. It will still result in a cycle, as dead bacteria will still be there. Although the detritus and other crap is now gone.