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Published on Dec 9, 2010
Cheap solution for automating aquarium water change (scheduled)... Efficient DIY Gravel Cleaner solution here http://www.youtube.com/watch?v=8X7V1k... About water treatment: I don't use any water conditioning but 3 in-line water filter with nylon, cotton and coal because my preoccupation is not about water quality but water temperature... And this is the the reason which I choose 2 half for filling with fresh water. About the 'technology' behind this project: 2 ordinary but electronic scheduled sockets, 1 normal closed water machine valve, 1 level sensor 12V(because it's not a good idea to put 220V in aquarium :) ), 1 AC adapter 220V-12V, 1 car blinker relay, 1 buzzer, 1 water pump and many hoses :)) ... Cheers ! Leo