Rose quartz planting for fish

We have just created a new pond out of an old whiskey barrel for our goldfish, which have grown far too big for their tank. I placed a rose quartz crystal in it this afternoon, programmed to bring the fish peace, healing and physical and energetic well being. This crystal will largely be cleansed by the elements but is best removed and rinsed with fresh water every three months to help cleanse and replenish its energy.