What trick did the water sales person use today in my office? [more inside]
posted by glaucon on Mar 20, 2012 - 30 answers

We are creating a tablet that purifies water and delivers a nutritious "juice". However we are designers, not chemists, and we need some basic guidance. Would it be problematic to combine chlorine (or preferably, a safer purification chemical) with a vitamin-based juice powder or liquid? Are there any health dangers to consider with this mixture? [more inside]
posted by thebigpoop on Nov 10, 2011 - 22 answers

My humidifiers keep developing a brown muddle. How do I keep them clean? [more inside]
posted by Make Way for Ducklings! on Nov 3, 2010 - 9 answers

Calling water purification gurus! Help me with an off-the-grid water recyclin' shower! [more inside]
posted by cr_joe on May 7, 2010 - 6 answers

WaterFilter: I'm looking into water purification devices. I'm mostly trying to understand what might help with various kinds of contamination threats: What would I buy to safely drink from a mountain stream? Is there anything that can help with chemically poisoned waters if one were, say, trapped in New Orleans by Katrina? Radioactive fallout contamination? [more inside]
posted by namespan on Nov 24, 2005 - 11 answers

At some trade show recently, Whirlpool showed a prototype washer called BioLogic that ("if feasible") relies on hydroponic plants to purify and reuse the water [pdf, p17]. So, are there any users out there who go to Kitchen and Bath trade shows, and know more details about how this works? Alternate question for hydroponics enthusiasts: What kind of plants are those in the washer?
posted by Lirp on Nov 11, 2004 - 1 answer