hottub... or skimmer?

[fiorano]

So the other day i was sittin in a hottub just kinda relaxin and thinkin about stuff you know. Then i noticed those little air venturi intakes and the more you open them the more foam and the more you close them the foam goes away. So then it made me think hey a hottub is kinda like a protein skimmer in how it injects air into water and mixes them to make foam an stuff... Then i remembered all the times when i was a little kid and it was oh so much fun to play in the huge mountains of foam that sometimes built up in hottubs hahaha now i just realized possibly how gross that really is. Has anyone else ever thought this before or am i just crazy???