pump size

[barngeatbayman]

I have a 90 gallon RR Oceanic tank. The overflow I believe produces 660gph. My sump is 42 gallons I was thinking of using a submersible pump specifally a Mag series pump. I have used the head loss calculator and am still unsure if I should get the Mag 9 or Mag 12, What do you think?

[barngeatbayman]

anyone? please

[oct2274]

i wouldn't go with a mag personally, i would recommend the eheim 1260. That would be my first choice, it will heat the water alot less than a mag and also be quieter. If you can't afford the eheim, get the ocean runner 2500. Both are much better than a mag. you can get both at www.drsfostersmith.com. You only want 3-5x your tanks volume turned over per hour by your return pump. Both of these pumps will be perfect. I use the 1260 on my 125 gallon reef and couldn't be happier.

[barngeatbayman]

I have been doing some research on submersible pumps I think the MAG is out and the Ocean Runner or Ehiem is in.

[scotmc]

I have been using OR 2500 for a week now. Very quite more than enough flow.

[barngeatbayman]

I am going to go with the OR 3500. I decided thanks for everyones help.

[oct2274]

3500 is going to be to big.......get the 2500. you shouldn't be trying to use your sump return pump for flow, remember flow through sump shouldn't be more then 5x your display tanks size which for you would 450 gph

[hypermikie]

If set on a Mag... I would go with a Mag 7. I have one on my return of my 70 and that is plenty of turnover...Maybe a little much.

[barngeatbayman]

the tanks overflow handles 650GPH so why wouldn't I get the OR 3500 and throttle it back with a ball valve? I dont believe the OR 2500 handles that much flow when you include head loss right?

[oct2274]

just because your overflow handles 650 doesn't mean you want to max it out.............they put the same overflow in a 30 gallon tank. You wouldn't want 650 gph through a 30 gallon tank either lol. Get the 2500. It will be perfect for your return

[barngeatbayman]

I dont agree that I shouldnt be using all of my overflow's capacity. You should have at least 5-7 times per hour turnover in your tanks correct. Well 7x 90 is 630 GPH per hour and if you factor in my 42 gallon sump, part of the system, right then 132 gallons x 7= 924 GPH, so I dont understand your logic. Maybe someone else would like to chime in and give their opinion.

[oct2274]

you don't use your return pump for flow. the return pump should be 3-5x through your sump. You should be using something like Koralia's or a closed loop for your flow. I'm not going to argue with you about it. I'm sure you know what you are talking about since you came here to ask for help right?

[barngeatbayman]

yes

I came here asking for help, correct but if I listened to everyone's advice I would have done 100's of incorrect things. I believe in this hobby there is more than one RIGHT way too. Look at most of these threads most people cant agree who makes "the best skimmer" does that make them wrong its what works for them. From the research I have done on this topic I think you are in the minority on this one, just looking for some other opinions.

[oct2274]

if you have been doing your research, you would know that 75% of people here believe the correct flow rate through your sump is 3-5x your tanks volume

[scotmc]

I have the same tank with a 30 sump. You ever did state what your head loss would be or what size drain you are using.

In my set up I have a 1 1/4 going straight to the sump with a Valve. The OR 2500 is more than enough. I had to cut back on the flow due to micro bubbles. I even added a filter sock. I have no micro bubbles.

Reducing water flow to the pump is not good for it's longevity.

The 2500 is a perfect match, unless you have major head loss.

You gotta do, what ya gotta do. Let me know how the larger pump works out for you.

[scotmc]

I think the majority of people have a flow 3-5x volume. There is no need to have highter flows running through your sump. You were given some good information. Why aruge someting you have yet to try?

[mile sq. reefer]

In your screen name did you mean Barnegat Bay, since you are from NJ. Spell check is a useful tool. Oh and don't knock the guy for giving good advice. Later.

[reef / aholic]

What size is your overflow?
How many teeth are in the overflow?
What size drains are you using?
What kind of head loss did you calculate for your pump? How big is the return section within your sump?

[barngeatbayman]

1" OVERFLOW
3 sets of teeth
I am using 1" drains

I dont have the paper where I calculated head loss but I recall somewhere around 260-290GPH