Is anyone running the 2 X 250 watt HQI Aqualight pro?

[G1GY]

Just wondering if anyone else is using this unit.

I just switched over to the 48" version on my 90 gallon and seem to be heating the tank up a fair bit.

I have it hanging 8" over the tank. Any opinions on how high over the tank it should be.

Do you think there's any point in maybe moving it up to around 12" above the tank or will that just make it less effective?

Thanks in advance for the input.