I had tried all types of mods on the 28g HQI to try and get it to run cooler. Ended up with the Hailea 150 chiller and it does a fine job. One mod you can try that does help is switching all 4 fans to suck in air instead of blowing air out - it did help , but not enough in my case.
I also think this system shouldn't be sold without a chiller , or at the very least , customers should be made aware of heat problems due to the metal halide before they purchase. My chiller added an extra £150 to an already expensive system , some people just can't afford it after forking out their "hard earned" on the system.
They are cracking little tanks when you get them running just right
Of course , if you live in the North Pole you should be ok :lol: