1 400 watt radium with basement sump. I run it 4 hours a day year round. Metal halide is in enclosed canopy. Dont see issues I just let fan blow across sump.
Side note I am getting ready to add 3 more 400 watt halides to the new tank that is plumped into same system. I will let you know if it poses any problems.
Sent from my SM-G965U using Tapatalk