if it was between 65-68 reservoir temps OR tons of bubbles and res temps at 75-77 which would be the better of the two to take? (can only have one or the other with my current set up)
i would say colder water. i run my bubble buckets at 65 an cold water holds more oxygen, less chance for root rot, algae and other water problems. so go cold water and tons of bubbles lol GL Happy Growing