Ahh I see. My bad then, but I do agree that I prefer sumps for tanks over 100 gallons. I run them on everything from 90 on up. Totally see your point on heating rooms vs heaters.....I live in Florida so heaters are something that rarely gets used, but could totally see those up north preferring to heat a room.
That being said, I run 5 sumps and all are one single chamber. Not one has 3 chambers.......just a sock hanging off the side and bio sitting before my pump inlet so the EVERY sump has 3 chambers is a little off the mark. A sump is a container.......what you choose to put in it is up to you. Most use the sump as a filtration device, some for plants, some for a qt tank for fish entering a system or for fish needing a timeout of some sort. I do it often sometimes with 12"+ fish.
and the water volume, in my case......is for the fish....lol regardless of wether Im on a drip or not. I responded to your post because this statement is, in my opinion, is just not true.......
"The maintenance and the amount of media is unbeatable. No sump can compensate or even stand its ground compared to a bead filter."
Everything you have said is true and I also run sumps in my larger tanks. I do like sumps but on large aquariums i lead towards bead filters. The sump in my 220 has a 2200 gph pump so fish living in the sump is just impossible for me lol They would probably die due to the current. But I did make a vast statement that is debatable as that sumps cannot stand toe to toe with bead filters. Its what an individual prefers.

