Richard J Kinch wrote:

mc writes:

I've tried adding fabric
softener but it's too strongly scented to use this way.

Google MSDSs; you'll find many are just surfactants. A bottle of the
cheapest non-polyquat swimming pool algaecide would be an unscented
lifetime supply (diluted with water).

Electrolube's data sheet gives no clue as to contents.

Graham