Thanks all for your comments. Its been a fun ride so far with LOTS of head scratching and learning! I used to program PLC's a long time ago, so learning the Arduino code has been a serious copy, paste and play affair!!
Lampshade - That Gobetweno looks interesting. Ive never heard or seen of that before and im going to look further into it. Thanks for the heads up!
VR
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View my Aquarium & Reef Controller build here:
The Ultimate DIY Aquarium Controller of the 21st Century!!!
LED's, PH, Salinity, Clock, LCD, ATO, Auto Water Changer, Variable Speed Cooling Fan Control and lots, lots more......