? about large tank filtration

[nero6370]

1st ?- About how much flow should I get from two 1 1/4" o/f's?

2nd ?- How large of a sump for a 700 gallon tank?

I am in the beginning stages of building my 700 and was planning to use a 75 for my w/d sump. Depending on what I use for bio media (probably scrubbies), how much of the tank should be devoted to holding them? The two o/f's will be on the same end of the tank, operating on the same design(more or less) as the corner o/f's in the All glass Aquarium tanks. I know there is a formula somewhere on the site...

 

[ken 429]

look at sticky on top of page titled how to size a pump for your tank by Chompers

 

[duke33]

bump

 

[nero6370]

I just read the sticky; not the answers I was looking for. I already have a pump for the sump; I want to be sure of the gph two 1 1/4 o/f's can deliver to the sump for my tank. Thanks guys

 

[nero6370]

Hey folks, I could use a little more feedback...

 

[Dr Joe]

1.25" should handle 700-800gph no problem.

Dr Joe

.

 

[maseyferguson05]

1.25" should handle 700-800gph no problem.

Dr Joe

.

That still would not be enough for a 700g tank(As Dr Joe probably knows)

What size pump do you have?

 

[VLDesign]

On my 800 gallon system the sump is 110 gallons (Full when power is off) and a single Reeflo pump that is pushing about 4000 gallons per hour through the 4 tanks. 2 x 250 & 2 x 150

Bigger tanks have 2 x 1.5" drains and are handling all the water that is being thrown into it. The smaller tanks have a single 1/5" drain in them. These tanks have less flow than the others obviously so the output is throttled down.

 

[WJC05]

Im running 3600gph on my 1100 gallon pond right now through two 1.5" pipes. Thats not pressurized, thats actual overflow.. Then Im running a 900gph pump on a 1.25" overflow. Hope that helps ya some

 

[WJC05]

And just to add to what I put above. None of them are at their max either.