Jake Adams, recap

[jrock]

Some of us were unable to attend. If ppl who went could give a recap of what was discussed, that would be cool. Thanks.

 

[Gomer]

Flow (gas exchange) > light > turnover

That is the simple version. I believe the advanced aquarist articles covers these points in more details. Good talk. Sorry you missed it.

 

[tuberider]

[quote author=Gomer link=topic=3544.msg40405#msg40405 date=1208060024]
Flow (gas exchange) > light > turnover

That is the simple version. I believe the advanced aquarist articles covers these points in more details. Good talk. Sorry you missed it.
[/quote]Flow (gas exchange) > light > turnover
Tony summed it up in a nutshell

 

[sfsuphysics]

--The amount of light that a coral can maximize (i.e. use) is directly related to the flow that's going over it (not something I would have thought intuitive), more flow is better (although he didn't touch on "too mucH" .. i.e. ripping flesh off the coral)
--Let your flow go in the direction of the open water, don't try crazy ass bouncing off walls or rocks tricks it's very inefficient.
--The closer to a physical surface something is the less water flow you'll achieve, so try to keep powerheads away from walls if possible, closer to the surface translates to more velocity
--Gyres are cool.
--Jeremy still didn't win anything.

 

[alve]

http://www.advancedaquarist.com/2007/1/aafeature#h5

Conclusions:

The reef aquarium hobby has a long way to go before our understanding of water flow catches up with what we know about reef aquarium lighting. Like the “Watts per Gallon” moniker that came before it, the use of “turnover rate” to describe water movement continues to cripple the progress of more advanced water movement techniques. By encouraging the formation of one or more gyres, aquarists are capable of producing more water movement in terms of overall water flow speed. Since higher flow speeds produce greater amounts of turbulence, this translates into increased gas exchange and higher rates of photosynthesis and respiration.

 

[jrock]

Okay, well you general recap is taken. I'm hearing a lot of other talk of what went down. Talk of powerheads and such, so what else was discussed?
By the way, did anyone happen to record the speech/discussion?

 

[Gomer]

If you were unable to attend, Jake has these articles you will want to read
1: http://www.advancedaquarist.com/2006/6/aafeature2
2: http://www.advancedaquarist.com/2006/8/aafeature/view
3: http://www.advancedaquarist.com/2006/9/aafeature2/view
4: http://www.advancedaquarist.com/2006/11/aafeature/view
5: http://www.advancedaquarist.com/2007/1/aafeature/view

 

[doliver]

Ok, so who wrote down or remembers the name of the great cheap timer he said can be had for $30 on ebay?

 

[Gomer]

Should be the Chauvet SF-4005...or at least that is the one I have

 

[seminolecpa]

http://www.instrumentpro.com/P-CHASF4005.html

I think it was one like this one. This is by no means the best price, just the first one that came up on my google search.

 

[dswong01]

I read somewheer that a company was repackaging/relabeling these unit SF-4005 as using as controller at much higher price.

 

[sfsuphysics]

I forget what use did he say that timer was for?

Obviously something to do with switching the way water moves but I forgot how it did that

 

[Gomer]

for alternating powerheads to reverse the flow of a gyre type setup.

 

[Paradox]

So should I ditch my Wavy Sea!

 

[sfsuphysics]

Simply switching powerheads on and off? Why wouldn't you simply use a couple cheap timers from HD or something? Sure you might get a few minutes where both are on at the same time, but seems to me that it'd be well worth the cost savings, again taking Bryan's link as an "average"

 

[Gomer]

I searched the "timer" and they came up at $29.99.
A pair of reliable timers will cost you at least that (sure you can get $5 ikea timers, but would you trust your coral on that?).
I'm not sure of any pair of timers costing $30 total that will let you have variable switching rates or even down to to the fast switch of these 2-15 min variable and I think there is also a faster mode. I think the cheap timers are mechanical switches with 15minute intervals.

 

[seminolecpa]

http://www.homedepot.com/webapp/wcs/stores/servlet/ProductDisplay?storeId=10051&langId=-1&catalogId=10053&productId=100026919

9.97 each at HD. and yes I would trust my coral on that. I have for years.

 

[Gomer]

I am fine with those, just not the $5 ikea ones

I have a "$10" time on my lights. The one you linked however is a minimum 30minute with only 6 setting "plugs". Works perfect for lights, but not for alternating flow. Even if you had 48 plugs, you'd be limited to 30minute oscillations. That isn't necessarily bad though. As for overlaping timers, one could argue that it could be good to have because it creates a period of turbulent flow.

I'm just rambling. Don't mind me

 

[Paradox]

Do those light controls have a ramping affect on the pumps or is it just on/off?

 

[sfsuphysics]

30 minute? Nah get the HD ones, while you don't have pinpoint accuracy (unless you buy digital ones) I'm not sure I would want to turn a pump off and on too many times in a short period of time.

But at $29.99 I would probably go that route, just the one Bryan linked to said $299.99 !