SCWD

[Charley]

I brought one of those into the store the other day. Do not know much about it other than seeing it run in an aquarium in Dallas, as well as the documentation that comes with it. Would appreciate hearing more about it as you work the kinks out of things.

Charley

[Chris]

Josh what sized pump are you running on it?

Also, what about trying to add some eductors to the output? That would considerably bump up the output.

I just gave myself a good idea. I was thinking of waiting around til a newer bigger SCWD came along but with Eductors it would probably push a lot of water.

AquaticEco 3/4" Eductor (http://www.aquaticeco.com/aquatic1v1/itempg.icl?orderidentifier=ID1051504828289237118&e flag=0&iteminfo4=0&itmid=4877&passitemid=4877)

[TexasState]

Becarefull so that you don't turn your tank into a whirlpool w/ the eductor. :lol:

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Posted on another board. Not sure if this was what you were looking for or not...


quote:
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I was recently provided with some data as a result of flow testing that was performed by one of our distributors. Using powerheads of various gph ratings they were able to provide flow-in ratings, flow-out, switching speeds, and efficiencies. I have provided that information below for your review. You will note, the higher the volume, the more efficient the device. Again, this was an independent test. Results will vary as I pointed out above, depending on each individual application. I hope this helps. Let us know your thoughts.

Good Luck,

Paul Muscarella
3iQ Ventures LLC
310-535-7003

Flow into SCWD|SCWD Output|Efficiency|Switching Duration

150 gph 90 gph 60% 22 seconds

180 gph 120 gph 65% 16 seconds

240 gph 180 gph 75% 12 seconds

270 gph 210 gph 80% 10 seconds

330 gph 240 gph 80% 9 seconds

400 gph 360 gph 90% 7 seconds

600 gph 540 gph 90% 5 seconds

720 gph 660 gph 90% 4 seconds

[Chris]

That could be your problem... I don't think it's rated for that much flow. The little chart Vinh posted only has a max of 720GPH. That sounds about right considering my 3/4" SeaSwirls were rated for 750GPH max output.

Anyone heard anything about a larger sized SCWD coming out? I saw somewhere on another forum that maybe after the summer, but haven't seen anyone else talking about that.

[RedDragon]

I dont know but I hope you come out with one soon I was going to get a scwd in the next month, I dont think i'll be getting now

[GeoB]

Does this mean the SCWD should be used with a pressure rated pump? I want to use one with a Iwaki 30RLXT. The pressure rated 30 size has to low gph, and the 40 size and above have cooling fans that make them noisy. Any other suggestions for a quite pump that will give 600 to 900 gph and does not heat the water?

I heard somewhere that the larger SCWD would be ready early next year.

[RedDragon]

maxi jet 1200

[::pete::]

I posted this site before, but for a closed loop. Here the SCWD (http://www.sparklingfloorservice.com/tank/closedloop.html) is used in a closed loop and the owner is happy with it. I would like to try it, Josh is your SCWD in use ?

[whatsareef]

I have been using my SCWD on the return from my sump.. I am currently using a mag 9.... no problems so far.

[kaiser]

I am wondering. Wouldn't the output velosity be higher if the outputs were reduced to 3/8" tubing. Just a thought.

[Instar]

The SCWD manufacturer claims that the swtiching rate is 7 seconds at a flow of 1400 gph and about 12 to 16 seconds at 700 gph, per phone conversation with one of them. Sounds like they didn't test them on a reef type setup from the conversation here. If you call them, one of the 4 will return your call in about a week. I use a 1400 gph sump pump and get about 1000 to 1050 return for the head height and no SCWD. I have about 1000 gph going over the overflow dam with a different switching device that pulses. Their literature, website and info is vague.

[Jimnorris]

I have a SCWD on a closed loop using a mag 18. It switches about every 6 seconds I am VERY happy with it!
Jim

[fuzz]

I run a SCWD as my return off a MAG 18, on a 75g. Since installing the SCWD I have taken out all of my powerheads. These things rock!! BTW, I have a mixed reef of clams, SPS, LPS and softies and everything is very happy with the flow.

-Greg

[captexas]

KAISER -
Velocity is not what you want to be high, it is the flow rate that you want to have high, especially in sps tanks. If you have a high velocity on the output, it will be like a water canon shooting your corals and fish to the opposite side of the tank. Reducing the size of the output will increase the water velocity at that point, but it will not increase the flow rate coming from the pump. Increasing the output size will reduce velocity at that point while still having the same flow rate and be more gentle on the tank occupants :-)

INSTAR -
They are a small company so you shouldn't expect too much as their resources are limited. Some testing was done on the input flow rate and how it relates to the output flow rate and switching rate. The results were not all that great due to the amount of reduction of flow so they were not publicized much. They have been tested though and if you do a search on this site you will find a thread that has the results posted.

I currently have two SQWDS being powered by my return pump, an Ampmaster 2100, on my 75g tank. They run water to 4 bulkhead on the back of the tank with locline nozzles that allow me to direct the water in whatever direction I want. Work pretty good. Still working on my closed loop setup though.

Chris