Circulation pumps also called “Hush Pumps”, and “Silent Flow” pumps are sold as an advantage and often as an upgrade on Hot Tubs.
The Pitch is that they are small efficient pumps that clean your water 24 hrs. a day and are quiet and efficient to run.
It’s usually about a $500 upgrade and in my opinion, they are not as good a the alternative which is a high flow circ system.
I’m not a fan of these systems I think they are sold to add margin into a deal or added value perception. It’s all marketing spin.