Added air pump and air stones to system. After seeing some curling of fan leaf tips got on reddit and contacted buddy. Both confirmed the curling was from deficiency. Started week at half strength nutes so I added the second half. Total PPM up to 1160. Within a couple hours fan leaves started to uncurl.
@Rusticbuds, actually you were right. I wasn't paying attention that the measurement was in ml/gal instead of total mills. I've corrected and the info should be accurate now. Thanks for the catch!
@Rusticbuds, I think the temps are actually slightly cooler than the gauge is reading because the thermometer is black and absorbing heat. I think I'm actually around the mid to upper 70 mark.