Greg's 75g

[gregzz4]

Originally Posted by SeaHorse_Fanatic

I run two heaters on my 165g. Not sure why so many heaters are in your sump. That's waaaaay overkill.

There is redundancy here, yes, but I'm not running them all, just the 200 watters.
The 2 x 250w heaters are backups on a Ranco, just in case the main heater circuit craps out due to either a Reefkeeper failure, or a Heater failure tripping the GFCI.
As for the 3 x 200w heaters; I prefer smaller heaters rather than large ones that can go haywire and cook things. I feel 3 x 150w just wouldn't cut it as it can sometimes hit 68F in our Livingroom.