how many times a hour should the water go through the sump?

[freezetyle]

Ha! thats why i love science. Its all conflicting theories.

[Zoaelite]

Originally Posted by freezetyle

Ha! thats why i love science. Its all conflicting theories.

It makes for some good debates. I would say any pump between 500 GPH and 1300 GPH will work for you, draw your conclusions off of what people have posted.

[golf nut]

Originally Posted by zoaElite

The filter sock would loose efficiency because it requires high flow to capture as much particulate as possible.

It does? how does that work, it is a filter, why so much flow the water falls out of the overflow box at a constant unless you are running a siphon ?

Originally Posted by zoaElite

You keep restating your point, your logic is understandable but I need some concrete proof (And no I'm not going to call Euro reef and ask them) before I believe it.

As Jack Nicholson would say "you can't handle the truth"

Originally Posted by zoaElite

The reason I don't believe you is because I own a skimmer, I have 7X turn over in my main tank and still get a very large amount of skimmate production.

as compared to what?

Originally Posted by zoaElite

If I slowed the flow down even more to the sump would I get more concentrated skimate...? I highly doubt it, again nutrients don't only exist on the surface they are mostly found dissolved in the water column.

Of course you will, if you slow it down by half the surfactants delivered to the skimmer will be double in the same time frame

Originally Posted by zoaElite

Considering that letting your skimmer have more access to the polluted water makes more sense.

That is the point.

[Zoaelite]

It does? how does that work, it is a filter, why so much flow the water falls out of the overflow box at a constant unless you are running a siphon ?

Water flowing out of an overflow box is proportional to the amount of water going into your tank... from your return pump, as that level increases more will flow out of the overflow box. More flow through a filter means that more particulate will be captured. This is a very simple concept, no need to be snarky if you can't understand it.

As Jack Nicholson would say "you can't handle the truth"

I'm not touching that one...

as compared to what?

As compared to not getting any skimmate at all, If I didn't have positive results out of my skimmer I would assume something is wrong. I'm getting positive results so I'm assuming my mode of skimming is correct.

Of course you will, if you slow it down by half the surfactants delivered to the skimmer will be double in the same time frame

Magically more surfactant is generated because less water is getting to the skimmer? Do you read what you write before posting?

This is my last post on the topic, as I don't enjoy arguing in circles.

[freezetyle]

Originally Posted by zoaElite

This is my last post on the topic, as I don't enjoy arguing in circles.

I was going to say just let it go. Our PM's have followed a similar path.

[golf nut]

I may as well talk to a couch....

[Zoaelite]

Originally Posted by Mr OM

I may as well talk to a couch....

Or two couches for that matter .

[Bloodasp]

la di dah. just make sure it doesn't slow down to a trickle and not too fast that the equipment in your sump are tumbling around.

[MikeInToronto]

Originally Posted by Mr OM

That part of your statement is not true it would work better under lower flow circumstances,
it would be more effective hanging on the back of your tank than being in the sump with a 10x turnover rate.

I was with you up until this post, and that's mostly because I was having trouble understanding both sides until now. However, a tank + sump is a closed system. The amount of water running through the sump should be irrelevant. It would be the same as a HOB skimmer running in a sumpless tank with 100x turnover using just powerheads. In this case, the DT is just like a big sump (since there is no sump).

Water in the sump is the same water as the DT. There is no special separation between the two except the OF, a pump, and some pipe.

The concept that "a sump is not a filter" is a good one. A sump really is nothing except a place to store equipment.

Now if your argument is that a low-flow overflow extracts surfactants better, perhaps you can discuss that more.

[MikeInToronto]

To the OP, I believe the recommended rate is ~5x but this is only what I read.

"I saw it on TV so it has to be true!"