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surfnsd

which pump?

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3 Comments
by
surfnsd
, 08-12-2010 at 02:45 AM (1585 Views)
Just picked up my new 80g tank. Never had to use a sump before so I was wondering what my max gph should be? Im going with an Eheim so would it be better to go with a 1250 (317gph) or do a 1260 (635gph) with a ball valve in between?

Ive heard that you want a lower gph for your return to let the skimmer work right? The tank will have mostly LPS and fish.

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Updated 08-12-2010 at 10:30 PM by melev

Categories
‎ Plumbing

Comments

  1. Midnight's Avatar
    The 1250 will produce just under 4 times tank volume and the 1260 will give you just under 8 times tank volume turnover. the ideal is 4 times, but you also have to account for head pressure, and or other things you want to run off of the return pump. I would go with the larger and see how it does.
  2. melev's Avatar
    You don't want to exceed what the tank can drain. How is the water getting down to the sump? Is this a drilled 80g tank, or are you using a HOB overflow?
  3. surfnsd's Avatar
    Its drilled with a 1.5 inch drain and two 3/4 inch returns. After doing the math my pump has roughly 4.8ft from pump to return outlet. I found a head calculator for the Eheim 1250 pump which says at 5ft would only produce 139gph.... If so I may need to go with the 1260 right?