The all in one Aquarium control shield is here! With sensors for pH and ORP, EC, RTC and hookups for many different types of peripherals all via USB it's the perfect shield for your project. Paired with the MacroDuino Code you can focus less on coding and more on perfecting your setup.
All documentation including schematics and usage can be found here.
You can also find additional posts about this shield here: posts tagged with Arduarium Controller