pump for my sump

[Dr Joe]

where are you getting it from? at bigals the 3000 is $40 and the 4000 is $60

http://www.drsfostersmith.com/product/prod_display.cfm?pcatid=9849

Point of order tho.. AquariumGuys say the 4000 is 'discontinued'

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It's a sump, an open, non pressurised system.
He wont be "push"ing the water through the bio-media with his pump.

The ability of the pump to deliver water to the level of the tank is the only thing that he needs to consider when selecting his pump.

Edited to add: Here's some pump head data for some of the Quiet One range,
http://www.marinedepot.com/ps_AquariumPage~PageAlias~pumps_pentair_aquatics_rainbow_lifegard_quiet_one_information.html

Not to derail the thread, but...

"It will work ok, but no margin if your sump is large with a lot of bio-media to push thru" ... Didn't say the pump was pushing the water thru .

For the most part it is accepted that water is pushed thru a filter, but I will re-phrase it for you... The pump draws water thru the filter and as it gets dirtier the pump has to "work harder" against this resistance, if it's already maxed out under clean conditions there is no way for the pump to "work harder".

So head pressure is not the only consideration here, but it is an important one.

Dr Joe

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[aropal]

The pump draws water thru the filter and as it gets dirtier the pump has to "work harder" against this resistance, if it's already maxed out under clean conditions there is no way for the pump to "work harder".
So head pressure is not the only consideration here, but it is an important one.
Dr Joe
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Its a key point which I'm obviously not getting across. A sump is a non pressurised system so any resistance of flow through the media of the sump such that flow to the return compartment of the sump is impeded will result in the return compartment pumping dry and the pump failing.

This is unlike a pressue filter where the flow will simply reduce. Putting a larger pump in place will clearly make this worse not better.

 

[soggysandwich]

Its a key point which I'm obviously not getting across. A sump is a non pressurised system so any resistance of flow through the media of the sump such that flow to the return compartment of the sump is impeded will result in the return compartment pumping dry and the pump failing.

This is unlike a pressue filter where the flow will simply reduce. Putting a larger pump in place will clearly make this worse not better.

so what are saying i could go with the 3000.

i just wanted to ad that this is not the only filter on the tank i also have a xp3.

 

[aropal]

so what are saying i could go with the 3000.

i just wanted to ad that this is not the only filter on the tank i also have a xp3.

You can use either in reality since blocking the flow of a sump such that insufficient flow to the pump return compartment causes problems will be ulikely so long as you maintain your filter.

If you have enough flow with the 3000 then you dont need to worry about resistance from the media.

However, there is another consideration in that the 4000 allows future upgrades by virtue of its increased capacity; though it does this by using 25% more power.

You could probably run the 4000 and ditch the cannister, but since you already own the cannister I'd run it along with the 3000 and have some redundancy.

The combination of XP3 and 3000 will provide more than 7x turnover which is more than adequate for your present bioload. (assuming you configure your sump appropriately)

 

[soggysandwich]

thanks for the help. but i just found a 150 for sale that has built in overflows and comes with a wetdry. and i think it comes with a pump. but thanks for the help anyways.

 

[Dr Joe]

I give up.

end of line.

 

[soggysandwich]

I give up.

end of line.

haha, turns out the tank doesnt have a pump. well it does but the guy says its going bad.

 

[aropal]

I give up.

end of line.

You give up?

Not an entirely helpful response. The problem was you simply didnt understand how a sump pump worked. I've tried to politely explain how your advice was fundamentally flawed but you appear intent to make this kind of statement rather than help the original poster.

Your choice of course, but it is likely to cause rather more harm than good don't you think?

 

[Dr Joe]

You give up?

Not an entirely helpful response. The problem was you simply didnt understand how a sump pump worked. I've tried to politely explain how your advice was fundamentally flawed but you appear intent to make this kind of statement rather than help the original poster.

Your choice of course, but it is likely to cause rather more harm than good don't you think?

Sorry for the derailment soggysandwich...

aropal, if you only knew who you were talking to.

Again, Sorry for the derailment soggysandwich.

Good Luck and post pix

Dr Joe

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[aropal]

aropal, if you only knew who you were talking to.

I should be more respectful because of WHO you are ?

Nice moderator grade response there.