*grin*

You may have missed the part where I say that I moved to an external durso mod, and it's still noisy.

Thanks anyway though!

Get A street 90

http://www.canreef.com/photopost/data/507/1407PVC90.jpg

and cut it as close to the 90 as possible and the slide it in!!!

Heres what I did to fit a durso in my extremely tight overflow box.
You at least have the benefit of having most of your piping outside the tank.
I basically chopped the 90 in half.
You also wont need to worry about glueing the 90 in, as there isnt any leaking issues due to inside the tank. Press tight will be sufficient.
http://i20.photobucket.com/albums/b2...1Image0002.jpg

http://i20.photobucket.com/albums/b2...1Image0001.jpg

OOkay. I've cut a 90 degree PVC fitting and siliconed it in place over the bulkhead (it's a threaded bulkhead, so I couldn't just get one to slip in).

I'm just going to wait an hour or so for the silicone to cure as much as possible, then I'll test it out.

I remember a thread on here a while back about someone saying their fish didn't like it when uncured silicone was in the water...anyone know if it will hurt my LR? It's all I've got in the tank right now.

curing silicone
 

Curing silicone releases acetic acid....vinager.
So some irritation to more sensitive animals but as long as your buffering is OK (normal alk levels) there should be any harm to the LR....theoretically :smile:
...mission success ?...quiet now?

*grin*

Thanks SO much for that info! I'm assuming that since I've got about a teaspoon of silicone in the tank, it's not going to do much to raise the Ph of a 50 gallon total system by much.

I haven't run any water through it yet...I'm not sure if water impededes (or does anything) to the curing of silicone.

Well, I wouldn't call it a total victory, but it's pretty darn close!

I only have to throttle my mag 9.5 back a bit, and it doesn't really gurgle at all. I may have to change my plumbing in the future, as I think a lot of my current noise comes from the fact that after coming out the bulkhead, it does a 3ft drop, then goes into my sump. Would putting a few zig zags in there help quiet the water down?

Also, someone mentioned earlier that my mag might die a quicker death by having some back pressure on it...is this true?

Thanks again to all those to helped me. I feel MUCH less stressed now.

if it is still making noise after the elbow addition and you still are throttling back a MAG 9 I would say the hole in the cap on top of your Durso is too big. I rectified the problem with a mod...it was mentioned earlier, the John Guest valve to control air flow.

http://img.photobucket.com/albums/v6...r/MVC-004F.jpg

I also had to cut back the elbow due to size restraints. Also I added a snail trap, believe it or not I did get a snail over my overflow and into the standpipe. What a mess.

I just put a piece of scotch tape over the hole in my durso till the sound went away. I think I ended up covering about half the hole. Currently with my eurobracing I can't even put the durso part on the standpipe and I just run it open but it has no sucking sound, compared to all the other noises that the tank makes, maybe I just don't notice it :razz:

I should probably be clearer...it doesn't make a sucking noise anymore :) I can just hear all the water rushing through the pipes.

If I throttle the mag down, the rushing sound quiets down (as would be expected).

I don't suppose anyone has any ideas on how to get rid of that?