size pump?

  • We are currently upgrading MFK. thanks! -neo
S

srawding

Jack Dempsey
MFK Member
Feb 12, 2008
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36
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What size pump do I need for my wet/dry to pump 6 ft up to my 2 overflow returns on my 265
I would always go more and maybe restrict with ball valve
it's a perfecto 265 reef ready with 1" overflows

One more question Does anyone have a perfecto reef ready tank with corner overflows that the covers slide up and off? Mine has this and the middle vents don't look like they could do anything the water going in cant really go up I don't see how it could work
thanks
 
Wouldn't I need bigger pump for dual returns?
Also might not be able to drill my glass wet dry might have to go submersible would like to go external though
 
Basically, you need a pump that will max out with 1200 gph AFTER losses to friction, height, etc. A 1" pipe will drain about 600 gph max, so your two will equal 1200.

I use Sequence Darts on big tanks (too much flow for you right now) and Eheim submersibles for smaller ones. Two Eheim 1260's or 1262's would be fine for you.
 
Why would the sequence pump be to much? because I can only output 1200 gph
would 1 pump with spliter be better or two pumps seperate to each return
The holes drilled are 1 3/4 but I think the bulk head size dia is 1" on the return the overflow pipeis 1 1/2
 
One more question what if i used all four drilled holes for overflows and ran 2 return hoses up the back of tank wouldn't that be 2400gph instead of 1200?
 
The size of the holes will be bigger than the actual diameter the bulkhead allows to pass. A 1" bulkhead needs a hole bigger than that to accomodate the bulkhead itself. If you actually have bigger holes, your flow will be higher.

Normally, the return holes are for 3/4" bulkheads, so you couldn't double flow in your second example, but you would definitely improved it.

A Sequence Dart moves 3600gph BEFORE head losses, so you may be able to configure a setup that would allow you to use it. Otherwise, I'd go with the two Eheims for redundancy purposes. There is not clear benefit or drawback (other than a slightly increased resistance) to a split return.
 
I believe there is a very clear draw back to a split return. It shouldn't slow the pump too much, but the clear part is the circulation in the tank. One return blows a lot harder and increases circulation.
I had a mag36 split to two 3/4" bulkheads, each of those was split with two returns in the tank. It just trickled out.. lol. While the other mag 36 on the same tank had one open 3/4" bulkhead and blew like crazy.
 
sequence dart on a 300 gal. tank. works flawlessly imo not a better pump out there for the money.
 
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