Safe Fuge/Sump at same level as undrilled DT ?

[EricR]

Is there a reasonably safe configuration where a separate tank is used as a refugium or sump that is at the same level as an undrilled DT?

Background:
-- Planning to swap out my current 37 gallon TALL tank for a standard 40 gallon breeder for better dimensions, at some point (for easier maintenance and better fit in the "nook" in the house where it sits).
-- There is nowhere BELOW to put anything but a decent amount of room behind. (Everything's in the tank right now -- 2 HOBs and 2 heaters).

I'm wondering if it makes sense to try to do something with a separate tank (same size or smaller) BEHIND the DT.
Goals would be:
-- Hide equipment
-- More water (plus I like the idea of a refugium)

I've seen HOB overflows but, well,,, uh,,, gravity isn't going to be that useful to me in this scenario.

As an aside, I'm also thinking about just going with one of the drop-in AIO divider kits so, if anyone has experience with those, I'm interested as well. (I've seen back and side ones but not sure which I'd be leaning towards if I even decided to go that route).

 

[lapin]

I dont know of any.
The word sump usually means the lowest point in a system for liquid to drain.

 

[elysics]

Is putting the sump HIGHER an option? Then you'd have the return pump in an overflow in the dt and a drain in the sump.

Not optimal by any means but it could work

 

[EricR]

Is putting the sump HIGHER an option? Then you'd have the return pump in an overflow in the dt and a drain in the sump.

Not optimal by any means but it could work

Interesting thought. I see some of these on the Internet now.
Probably not an option I want to explore in the space I'm dealing with but thanks for the tip.