I've got a few quarts left over of Oasis Pools Super Sheen Water Clarifier and Polisher. Are these types of additives safe to use, or are there any residual build-ups of anything I need to be concerned with? They do improve the sheen a bit, so I was going to continue to use it occasionally prior to gatherings at the pool. The bottle doesn't list the ingredients or the company that actually makes it. I don't use any other pool store chemicals other than pH Down. My water looks pretty darn good without it.