The Loach Forum Archives (1)

I'm not so sure myself now !

Posted By: Steve Burton <sdburton@hotmail.com>
Date: Wednesday, 17 March 1999, at 4:21 a.m.

In Response To: I'm an ....Airhead (BB)

Yep, that's basically it! To my knowledge, venturi is both the principal, and also the jets used - as in carburettor venturi (although they work in the reverse way - fast moving air drops the pressure in the carb, drawing fuel out the venturi and creating an air fuel mix). For powerheads, fast moving water drops the pressure in the venturi, causing air to be drawn in, et voila! - small bubbles!

As far as I can remember (bearing in mind I've only been awake 2 hours without coffee!), some powerheads have this feature built in as you described. Fluval sell a venturi device accessory which is basically a tube of larger diameter on the input side, smaller diameter on the output, with an airline in the constricting part of the tube, and a valve - price approx 4GBP (6USD?) - saves buying a new powerhead!

How fast will the water be moving ? If the flow rate is too high, wouldn't the sand be stirred up, or is that your intention - I would imagine the sand would probably redistribute itself in the lee of large rocks, still, it'll probably attain a "natural" look, which is what you're after ...

keep us posted on how you get on - some piccies posted on the main page would be superb -- BB's (inverted) loach wall-of-death ...

Steve
 

Messages In This Thread

• Another flowing idea..
  BB -- Tuesday, 16 March 1999, at 1:51 a.m.
  • Re: Another flowing idea..
    Steve Burton -- Tuesday, 16 March 1999, at 4:28 a.m.
    • I'm an ....Airhead
      BB -- Wednesday, 17 March 1999, at 12:14 p.m.
      • I'm not so sure myself now !
        Steve Burton -- Wednesday, 17 March 1999, at 4:21 a.m.
        • Holley Venturis Batman!
          Martin Thoene -- Wednesday, 17 March 1999, at 5:52 p.m.
          • 900cfm powerhead! Fully adjustable springs w/ polished float bowl! *grunt* *grunt* *grunt* n/m :)
            Craig D'Orsay -- Wednesday, 17 March 1999, at 5:57 p.m.
            • Ain't NO substitoot fer coobic inches boy!
              Martin Thoene -- Wednesday, 17 March 1999, at 6:07 p.m.
              • Cid - Not Sid :)
                Craig D'Orsay -- Wednesday, 17 March 1999, at 7:16 p.m.
                • Now don't go rattling her cage!....................n/m
                  Martin Thoene -- Wednesday, 17 March 1999, at 7:39 p.m.
                  • My powerhead is in the back yard up on Cinder blocks....
                    Craig D'Orsay -- Wednesday, 17 March 1999, at 9:00 p.m.
                    • Uh oh! Cars an' wimmin.....go get 'im Cid an' Cinder!
                      Martin Thoene -- Wednesday, 17 March 1999, at 9:49 p.m.
                      • How on Earth did I get dragged into this?
                        Cinder -- Thursday, 18 March 1999, at 3:14 a.m.
                        • Boys will be boys ;-)
                          Cid -- Thursday, 18 March 1999, at 3:46 p.m.
                        • The Canadian started it!
                          Martin Thoene -- Thursday, 18 March 1999, at 5:48 p.m.
                          • Hey there
                            Cinder -- Thursday, 18 March 1999, at 5:55 p.m.
          • Bleeding a powerhead..
            BB -- Wednesday, 17 March 1999, at 9:26 p.m.
            • FYI BB
              Martin Thoene -- Wednesday, 17 March 1999, at 9:53 p.m.
              • Re: I educted some great info:)
                BB -- Thursday, 18 March 1999, at 12:13 p.m.
            • How do you bleed a powerhead?
              KoiKat -- Sunday, 21 March 1999, at 5:40 p.m.
              • Well it easier with two people..
                BB -- Sunday, 21 March 1999, at 9:49 p.m.
        • The fluval 4 barrel powerhead...
          BB -- Wednesday, 17 March 1999, at 8:54 p.m.
          • Re: The fluval 4 barrel powerhead...
            Craig D'Orsay -- Wednesday, 17 March 1999, at 9:50 p.m.
            • So do we use a GMC 6-71 Blower instead of an air pump?
              Martin Thoene -- Wednesday, 17 March 1999, at 10:06 p.m.
              • Now you're cooking!
                BB -- Wednesday, 17 March 1999, at 11:52 p.m.
                • Re: Now you're cooking!
                  Martin Thoene -- Thursday, 18 March 1999, at 12:03 p.m.
                  • Don't forget the 200mph Duct Tape! :) n/m
                    Craig D'Orsay -- Thursday, 18 March 1999, at 12:41 p.m.
        • ..... did I miss something ???? n/m
          Steve Burton -- Thursday, 18 March 1999, at 4:17 a.m.
          • You did! We bin bench racing......well Tank-stand racin' anyway!
            Martin Thoene -- Thursday, 18 March 1999, at 5:59 p.m.
  • Re: Another flowing idea..
    Michelle -- Tuesday, 16 March 1999, at 1:43 p.m.
    • You watch wrestling also?
      BB -- Wednesday, 17 March 1999, at 12:44 p.m.
  • Re: Another flowing idea..
    Martin Thoene -- Tuesday, 16 March 1999, at 7:22 p.m.
    • Even better ideas...thanks
      BB -- Wednesday, 17 March 1999, at 1:40 a.m.
      • Re: Even better ideas...thanks
        Michael Ophir -- Wednesday, 17 March 1999, at 5:27 p.m.
      • Even better than that.................
        Martin Thoene -- Wednesday, 17 March 1999, at 6:01 p.m.