DIY CO2 Question

[fatpuffer]

I have a DIY generator and attached the end of the tube to a powerhead. After a week or so, I noticed that the output of CO2 is less. I checked the end of the tube and there seems to be a constriction of the inner part of the tube. I guess that the CO2 and water creates a carbonic acid, slowly constricting the flow. I cut that piece off and the flow is back to normal.

Question is: Can I do anything to prevent the tube from "melting" I can continue to cut the tube but eventually I will have to buy a new set since this will be shortened. Can I use any other tubing, ie. hospital O2 tubes or IV lines?

THANKS

Js

[jvision]

Is the tube degenerating, or is there a build up at the end? IME, when using DIY, the end will start to clog with a build up of some sort. I think it could be bacteria or fungi that feed off the sugar - not completely sure, tho. Try using a toothpick to clean it out.

BTW, I use a plastic valve to constrict the flow of CO2 into my powerheads, so that the smallest bubbles possible get injected into the powerhead's intake (not the venturi hole).

[fatpuffer]

I, too, have the tube inserted in the intake part of the powerhead. It may be a build up of the tubing "melting" due to carbonic acid.

I like the plastic valve idea...where can i get one of those valve?

On another note, the plants you send me are nice and healthy. I found a couple of snail egg patches on them. I hope they hatch...extra foods for the puffs.

THANKS!

Js

[jvision]

They're cheepo plastic valves... can't think of the name, but they're blue. It's has 2 male ends and a screw in the middle. I pick 'em up at Nature's Corner when I need one for about 50¢ a piece.

Edited April 24, 2006 by jvision

[vic]

Hey there:

One solution is to get the appropriate size of brake line. This stuff is RAM tough and will not succumb to the carbolic acid. I would also suggest that you get a 1 litre pop bottle and put two holes in the lid. Insert the outlet from the generator in on hole and run the tubing down to a couple of inches from the bottom. Insert the line to the tank about one inch into the other hole. Tape the 1 litre tank to the side of the generator so that the tops are approximately level. This will stop the contamination issue and give you a resevoir in case the generator overflows.

Cheers;

[fatpuffer]

My generator is outside the tank apprx.2.5 feet below the powerhead. I dont think there is any contamination at all. I think the carbonic acid is slowly eating away at the tubing (inside) and it builds up to mushy consistency inside.

Where do u get break line.

THANKS ALL!

Js

[Vallisneria]

Isn't there special tubing made for co2?

I've never experienced this problem with my DIY bottle and regular airline tubing.

[cgmac]

www.rexgrigg.com

Try looking at this guy's site! He sure has a lot of useful info on diy co2.

Hope it helps you.

[Milan]

Fatpuffer, I'm leaning toward Jvision's diagnose of your problem. It is known that yeast/sugar mixtures provide a very good breading ground for bacteria and fungus stuff. I experienced it too, when I was on DIY. It appears like a whitish, jelly-like substance which obstructs the gas flow. However, if you are not using silicone tubing for your CO2 line, you may blaim the H2CO3, but such a tube meltdown would occur after a long period of time.

[fatpuffer]

THANKS!!!

Js