I'm assembling my equipment for a 90 gal reef.
As fa as heaters go, I've read 2.5 WPG.
I'm going with a 20 gal sump. should I get two 100-150 W heaters? or 1 250 W?
If two heaters, would they both go in the sump?
Thanks!
It is best to get two so that if one fails your fish wont get cold.
I would put both in the sump. I hate looking at heaters.
Check out the new titanium heaters. They will not break and are cheaper than glass.