Hi everyone!! I recently had a comment on another thread about changing my gravel to sand as I have a few goldfish who I’m worried might swallow it. Does anyone have any recommendations as to what brand and or type is best (I have a 55gal tank with 2 small telescope eyes and 1 big Oranda)? Also, what is the least stressful way of changing from gravel to sand, regarding my fish? I don’t want to stress them out as they are really sensitive. Do I have to remove them from the tank? I don’t know as I’m relatively knew to the fish world and have never used sand before. Another suggestions and or comments would be greatly appreciated!!