RDWC setup (thoughts opinions)

Well im not saying 65 is a bad thing necessarily

Cause in the ground thats about the temp they would be .

My ideal temp is 70 for root zone

I hit 75 regularly though but it cools slowly at lights off till it hits about 68 69 ish

hey guyzi just found that:
http://www.alienhydroponics.co.uk/s...s-air-diffuser-16mm-elbow-fitting-detail.html
look very nice, no?