Safe and cheap way to keep reservoir water drinkable

[paittibahi]

 

[TechWarrior]

Out of 1000 youtube channels that I watch, this one is My #1 fav youtube channel follow by Vsauce. Big fan of both guys.

 

[Citizen X]

Out of 1000 youtube channels that I watch, this one is My #1 fav youtube channel follow by Vsauce. Big fan of both guys.

DONG is alright too

 

[NasNY]

my favorite website
phys.org