sump size

[Pito]

I wanto to make my own sump. What would be a good size for a 120gl?

 

[hobbzz]

As big as you can fit in whatever space you're putting it. I currently have a 40b tank and 40b sump, but thats larger than normal. Iirc most people go with a sump about 1/4 the size of the tank.

 

[OKDOHK]

I agree with the above post. Also depends on how much equipment you plan on running. I like to run everything in my sump, the only thing i don't is the calcium reactor. I would suggest at least a 50 gallon.

 

[offroadr]

I am building a 55 for my 150

 

[NanoReefWanabe]

i would say 1/3 display volume would be my minimum, however in this case bigger is always better, the more volume your system has generally translates into it being more stable.

a 40B would make a perfect sump for you if it is in stand....otherwise go as big as you can.