WTB: External pump rated 2300-3000gph

[DarkFORCE]

Ouch! Also looks like these are $250 each.

 

[clkwrk]

yup and you would still need a pump if you are trying to add more flow to your existing flow.

 

[Fliger]

Well if your tank is already drilled than you wouldn't use one. They are pricey but they save a bunch in plumbing, are more versatile and movable. Plus you don't need a pressure pump or plumbing and you save a bunch in electricity. You will need a power hungry pump for eductors. They're not really THAT much more if you're in the set-up phase. Plus they come with their own controller that allows you to control the sweep & the speed.

Wait til ya price out those Pressure-Rated Japanese Motor Iwakis. ;-)

 

[clkwrk]

Why do they save alot in plumbing ? You still have to get water to it right? Oh are you thinking about having it hooked up to a power head. I'm not anti WS just trying to put it in perspective.If you are trying to add 1000-3000gph woth of flow to a tank then you would still need a pump and still have to drill the tank for a closed loop with the WS. Same plumbing is still involved.


You could always look into seaswirl. They arent speed controlled but move the same . Oh and cheaper.

 

[Fliger]

Just bulkheads, drilling, time - plus the versatility. You're just trying to justify six Streams in your tank. ;-) I'm not disagreeing with anyone either, just trying to provide an option. Like many things, they seem expensive at first then prove themselves worth it once you get them up. Plus I have seen many failed eductor experiments.

Ack ... Seaswirls ... owned many ... hate em. Loud and they break. Its like comparing a SEIO and a Stream, seriously. Ask anyone who's owned both. Plus the largest SS can't handle nearly the GPH of the smaller WS, and they don't come with a controller, or different mounting hardware. The WS came with different sized barbs and things that were just nice touches. Plus they are dead silent.

Just a nice option, but beating a dead horse since he already has the bulkheads.

 

[DarkFORCE]

No it's good to hear the options out there. I am open. I want to get some good flow in the tank this time. I am wanting to do this without powerheads. I think for a 90g tank with powerheads alot of room is really wasted.

 

[DarkFORCE]

Well I ordered the pump and Penductors tonight.

 

[DarkFORCE]

Last night I ordered Iwaki MD-40RLXT Japanese Hi-Flow pump and (2) 3/4 inch MPT Black Penductor with 0.375-inch orifices. I guess we will see what kind of flow I get.

 

[Fliger]

Keep us posted! I'm pretty sure these do better with a pressure rated pump (the RLXT is not). This is from the website.

For you Iwaki guys, I have the (top secret) performance curves and will do the math you. Also listed are the horsepower of each pump. (HP x .75 = kW)

MD (or WMD) 6, 20, 20RZT - Give this pump to your kids - not big enough.

30RZT or 30 RXT - (1/16 HP) - you will notice improvement with one eductor however you are still on the small side.

40 RXT - (1/12 HP) - maybe two - however you are on the low pressure side but will see solution movement improvement.

55RT - ( 1/9 HP) - definitely you would really charge one - you might what to distribute the wealth and use two.

70RT - (1/4 HP) - you will drive two or three eductors. v

70RZ - (1/4 HP) - use two - the pump runs out of flow beyond 10 GPM - This however is a really good pump to utilize the eductor principle because it produces high pressure at low flow. With two .30" orifice eductors, the pump will go from moving 11 GPM to 50 GPM.

100RT - (1/3 HP) definitely three will get very excited - four would probably be best to prevent too much in one area.

For the above pumps I would suggest installing a ball valve between the pump and the eductor (probably just one if you are using two or more) just as a control device to maybe slow things down if the eductors / Penductors work too good.

What if I don't have "a pressure rated pump" or 10 PSI - will they still work? Yes, however the fan angle will decrease and the extra solution educted will also decrease but amazing results will still be realized. Low pressure chart. (All pumps produce pressure otherwise they wouldn't be able to move liquid through the pipe - let's call them a low pressure pump, OK?)

http://www.kthsales.com/website/Misc/hello_salt_water_enthusiasts.htm

There is also a low pressure chart in the link you might want to look at. I was going to use them on my 340 but I didn't have a pressure pump and read some threads here on RC that said they work poorly. I played with a Little Giant pressure pump and it did work much better, but the pump was too loud.

 

[DarkFORCE]

Thanks for telling me. I changed the order to the right one.