I am currently building a similar project but using the arduino. It will be interesting to see which way you go with hardware/software.
As was recommended to me, the etape liquid level sensor isn't the best thing to use for aquariums. I bought one and tested it out and quickly realized that it is quite sensitive to any movement or twisting/bending of the sensor. It was recommended I try out a pressure sensor. It only cost $14 and after some testing I've done it seems to be a lot more consistent in its readings. Heres a link if your interested. http://www.digikey.com/product-detai...GC7U-ND/951844
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Current Tank Info: 75 Gallon Mixed Reef, and 6 Gallon JBJ Nano
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