HOB Overflow

I was just wondering how much gph should i buy for a 55 gallon tank? I also would like to ask, how big of a tank should i buy to build my sump? Thanks!

 

I am going with a 300 GPH unit on my 55 once I finish the stand etc.

 

What are your plans for the tank? FOWLR, Reef only, Reef with fish?

I probably went a little overkill with my 55, but I have an Eshopps PF-1000 overflow box going into an Eshopps R-200 refugium/sump.

But your overflow should really be determined by your return pump. Look at your pump (I have a Marineland Maxi-Jet 3000) and what it will do at the head pressure it will see, and size your overflow from there. You want your overflow to be oversized so that you do not risk overfilling your DT. People will say that you can just lower the flow rate on the pump using a valve, but this will shorten the life of the pump and should be avoided (IMO).

 

i have the nano (200gph) on my 29g...wish i went with the 300gph model. always better to go bigger i say

 

I have a 800gph, but since I reduced the flow through the bulkhead from a 1' flow to a 3/4 flow I think I reduced it to 600gph, my pump is a 770gph pump, seems to work well for me and thats for a 40b.