wah so powerful lighting system. even dead n rotting plants plants will start bubbling. i have no experience with MH lights, onli been working on PL n FL lights onli. by the way, how the 2 DC fan will bring down the water temp? i thought it should be blowing on the water instead of air around the lights. since temp is a issue for u, thought of installing a chiller like those in marine tanks for ur tank? i guess for ur 4f tank, installing as many of this DC fans wun help much. in my own opinion DC fans are onli for 60 gallons n below. correct me if im wrong.

hehe havent try arcadia before coz it is so damn expensive. one tube of 20watt cost about 30 to 40 bucks. AZOO onli 18 bucks.

btw cj, do u use any co2 system for ur 10g tank?