1. Using a Multimeter to Measure the Conductivity of a Water Sample


    from Antonio R. Chaves / Added

    106 Plays / / 0 Comments

    This provides an alternative to using a conductivity meter. Even though 9-volt batteries are cheaper and safer, their voltage may drop during discharge if they have been heavily used. This would make your readings unreliable. If you want to use 9-volt batteries they need to be fresh. Lead-acid batteries work best because their voltage only drops when they are almost completely discharged. Graphite electrodes are used because electrolysis process is very corrosive in most metals.

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    • OB Aquaculture Overview


      from Operation Blessing International / Added

      267 Plays / / 0 Comments

      An overview of Operation Blessing's Aquaculture programs in Haiti. Operation Blessing is implementing an ornamental tropical fish hatchery and a tilapia hatchery. This hatchery consists of tanks with recirculation filters, temperature control, a water chemistry laboratory and a fish health lab.

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      • Brewing TV - Episode 73: John Palmer on Water


        from Brewing TV / Added

        32K Plays / / 2 Comments

        In this episode of Brewing TV we've invited John Palmer to discuss his new book, "Water, a Comprehensive Guide for Brewers." He discusses water's role in the brewing process, how its composition can affect different beer styles, its effect on mash pH levels, and much more. Water, a Comprehensive Guide for Brewers http://www.northernbrewer.com/shop/water-a-comprehensive-guide-for-brewers.html LaMotte BrewLab Basic Water Testing Kit http://www.northernbrewer.com/shop/lamotte-brewlab-basic-water-testing-kit.html

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