PH-testing of the water and discussion on water heating

Aquaponics Group Meeting #7

8 May 2012

The Aquaponics Group will meet at the Van Gendthallen to talk about how to extract the heat from the LED-lighting, and how to build a system that uses that heat to heat the water in our aquarium. We will also test the PH-values of the water we are using right now, and we'll make a shopping list for the upcoming building weekend. Feel free to stop by. "Pompoen met Speck" will cook us a nice meal, so if you want to have a bite to eat, RSVP on this page.

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Jules washing clay pebbles - Before putting them in the grow bed, clay pebbles require preparation. They should be cleaned to remove dirt, dust and other contamination.

With: Jules Marshall
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Jules trying a new smaller pump for the test system - Picture made during the Mediamatic DIY Aquaponics Building Weekend #2 at Mediamatic Fabriek. Nadine Hottenrott

With: Jules Marshall
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Arnd checking the auto-siphon - The auto-siphon allow the grow bed to fill to the required level before triggering a siphon effect which drains the water from the bed.

With: Arnd Marijnissen
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Measuring NO3 level - In the aquaponic cycle, ammonia is converted to nitrite by nitrosomonas bacteria. When the nitrite level in the water reach a certain point, other bacteria, nitrobacter, convert nitrite to nitrate, which are less harmful to the fishes.