Eductors,or penductors ??

[reefrubble]

I have a 6' long BB tank ,and I can't decide if I should use eductors,or penductors. Is there a rule of thumb on tank size? Is there a big difference in the two?

[Acroholic]

http://archive.reefcentral.com/forums/showthread.php?s=&threadid=372881&highlight=penductors

long but informative......

[reefrubble]

Thanks for the link Acroholic, I'll take my time,and read it through.

[Chrisrush]

Reefrubble,
I have 2 penductors on my 120 (4') long tank. I really like them. They put out quite the amount of flow, especially in a 4' tank. I went with them due to the size difference, as I didn't think that I needed the extra flow that I would be sacrificing.

Chris

[DLS]

I think eductor= more flow but bigger and penductor = smaller with less flow.

[Acroholic]

I personally purchased 3/4" Eductors, and modified them a bit by opening up the discharge orifice to 3/4", thereby creating no backpressure on my pumps. I know I am losing a bit of performance this way, but I still have the benifit of the eductor diffuser......so basically I am trying to get the best of both worlds..I just didnt like the idea of constant backpressure om my pumps, even though both my Iwaki's are pressure rated...

[reefrubble]

Thanks for the info Chris,I know what you mean about size. I don't like things distracting my view. We don't have reef tanks to look at plumbing.

DLS,I know you get more flow with the larger eductor,than you do with penductor . I just don't know if I need to go with the eductor on a 6' long tank.

Acroholic, I also don't like the idea of all that B/P on my pump,but I do want the high flow with out the strong force stream you get coming out of a standerd fitting . Will the smaller penductor give me flow all the way down the entire 6' of my tank?

[raven567]

I have two penductors on my 6' 210g tank. One in each back corner facing center front glass. I get quite a bit of flow out of them. I also have 2 scwd's and am thinking about swapping them out for two more penductors. I've never used eductors, but I don't know if the extra size would justify the extra flow. Maybe they're not that much bigger though.

[Chap]

I have 4 penductors from KTH Sales on a BB 180 powered by an Iwaki 100. Flow is awesome. I did open the the discharge orifice a little bit with a 3/8" drill bit. I really like this set up but will be replacing it with a Reeflo Dart and Oceans Motions 4 way this weekend (hopefully, I have been procrastinating for a few weeks now).

[Briankook]

I have 2 penductors ran by an Iwaki 55 & 1 penductor & 1 eductor ran by a Blueline HD55 on my 180 & I think that I have plenty of flow. IMO, it can't hurt to mix them up.

[pickle311]

I have 2 eductors on a 120 4' with a Sequence 4800SEQ22 running them. The flow is unreal, I have trouble keeping water in the tank.

[deansreef]

are streams less flow than eductors?

[Briankook]

I think that it depends on what pump is used as well as what configurations are being used. I never owned a Tunze, so I'm not sure.

[Chap]

I removed 2 Tunze 6080's and 2 Seio 1100's when I set up the 4 penductors. The flow is better with the Tunze's because it is softer but moves as much if not more water, but I can't stand the look of power heads in the tank.

[myreef]

I have 2 penductors being pushed by a BL-100....tremendous flow! The penductors are more pleasing to the eye, since they are shorter.

[Briankook]

chap & myreef, not to mention no electricity "inside" the display tank.:D