I have some rock that was in a tank for about a year. After the last fish passed my son lost interest so I shut down the tank. The pump and heater were off on it for a few months but the rock was kept submerged. Yeaterday I took down the rest of the tank and the rock sat in freshwater overnight. Id like to add this rock back to my main display, after a good rinse would it be okay or do I need to do a bleach soak first?