Sump Too small?

I think you will find it will be a good fit under your 120. Leaving plenty of room under your stand to work and for other equipment.

 

I think so. I know a few people that use a 20 long under their 120.

 

I'm not sure there's really a sump that's "too small". It's really just a place to put the "uglies" that support a stable system. Of course the higher the total water volume the better but every system is unique. For a simple system with compact hardware a smaller sump is just fine.

 

As long as it can hold all your equipment you are looking at putting in it and in the event of a power outage that it is big enough to hold all of the water from a back siphon you should be good to go.

 

I have a 20 long under my 75 and wish I could have something bigger.

 

Idt that a 20 is big enough for running your skimmer and supporting back siphon when power goes out. I would at least do a 29 tall. Im using one on my quarantine and its jusy enough.

 

Yeah that will work just fine, I have a 10 gallon under my 60Cube cuz it was the only thing I could fit. I have my skimmer, return pump, biopellet reactor, uv sterilizer, and a carbon reactor. I don't have alot of room to move things around but it's been running just fine for 2 years. If i had the room I would go bigger to increase the total water volume. I've thouhght about setting up a remote sump in the basement, i will probably go with a 75 or bigger if I end up doing it. Good luck man!

 

petco dollar gallon sale had 40 longs for 40$