6
votes
3answers
622 views

How can I determine what is in my water?

My question is, how can I determine exactly what these "floaties" are that I see in my drinking water? I know that I sound crazy and more than a little obsessive-compulsive....my wife tells me this ...
7
votes
1answer
799 views

When to replace respirator filters?

I've got a respirator like this one: I assume with the particulate filters (for dust) you just change them when they get hard to breathe through, but what about the organic vapor or chemical ...