hope this question doenst come off as dumb so here it goes lol...a few months back i was starting my tank over and i filled my tank with a hose from outside my window, however i didnt realize the water was aweful w tons of rust, so i drained the water then tried again with the tank, this time i got all new sand and all my water is RODI water, the rocks that i had in the tank were stained with rust and its alot of rock and dont want to throw them away whats the best way to clean them, or should i discard them all together?, i soked them in bleech w water now for a few days and the rust color is still on the rocks, what should i do?