MartinMan Messages 5 Reaction score 0 Thread starter Mar 6, 2015 #1 What combination of these might produce a brown solid? For talking's sake...
Bystander Science Advisor Homework Helper Gold Member Messages 5,628 Reaction score 1,777 Mar 6, 2015 #2 The dirt, dissolved iron, hard water minerals, and grease in the plumbing.