CO2 mesh bell...Eureka!!!! A perfect simple solution?

[Rolo]

Originally Posted by Ironloach

Just a thought, will this work with a foam (the one you stuff in filters) instead of a mesh?

I've noticed that the gravel-vacuum diffuser model uses foam to diffuse the CO2. Was just wondering if the same concept will work with Fedge's model.

Pretty much anything that doesn't let CO2 bubbles go through, but would allow water to is doable. I have a very fine nylon fish net that works very well.

[fedge]

That has been tried... read in the begining about the "fart"...i think foam would clog after awhile (co2 tends to cuase organisms like bacteria or algae colonies to grow rapidly--ones that use co2--they might clog the foam after awhile.) The mesh seems to be the best option it does not have enough surface nooks to facilitate growth.

All my projects are still going strong...

[Laith]

Very interesting idea!

I currenly use a Dennerle ladder. While I'm happy with it, I've been thinking about building a reactor to get even more efficient diffusion and to take up less space in the tank.

Does this idea work with pressurized CO2 as well? I don't see why not...

[donkey]

i was thinking instead of using screening material could you use a Gravel Tidy ? as over here in the U.K i have never seen any screening material .and how about using a cable tie instead of a rubber band .

[fedge]

Cable tie...!! Yep that is why as a community we are stronger in ideas... thanks. I am uncertain what a "gravel tidy" is... But, the US english, and the UK english has a lot of differences.

Today I got my 3" disk to "burp"!! I squeezed the bottle (end of cycle yeast bottle) a tad and got a lot of bubbles to come out...

[donkey]

Hi there fedge
a gravel tidy is a screening material that stops two diffrent kinds of gravel from mixing say like coral sand and coral gravel have a look here

http://www.underworldproducts.co.uk/...plate=info.htm

[donkey]

i would think that this would work fine for your diy difusor and it looks the same colour as the sand that i have in my tank .and it is all so safe to use in fish tanks . so people over here in the U.K could maybe try this if there having a problem getting hold of any screening material that you are using over there in the U.S.A

[fedge]

Gee.. I don't see why they would... Don't you have window screens in your houses? Like in the summer?

[donkey]

whats this thing you call summer? dont forget mate i live in England we dont get many of them ( lol )

[fedge]

Ive never been there... I live where in summer it gets about 80 to 90 F and humity about 65 to 70% or more..most of the time...we run airconditioners all the time..

[donkey]

wish i where there but i do know what you mean about the screening doors you have over there . but you never see them over here .the weather is just not that good over here so we dont really need them

[zapus]

Well, I decided to jump on the bandwagon. Whacked down a stainless steel coffee filter to fit in the back of the nanocube, jammed it in, and stuck the hose underneath. It could use one of those suction cup airline holders to hold it in place better, but so far, so good.

[fedge]

************UPDATE**************

Today I bought me some more fish (stupid me)...anyway.

I kept hearing this weird "burp" sound. I looked and the 3" mesh system was burping out gas. HOWEVER, upon further inspection I noticed that my DIY co2 yeast system was outputting a lot of bubbles, about 30 per minute!! I did add a pinch more yeast in the mix this time. I guess it is a little too much. I wish i could scientifically measure the ammount of gas output, but I can't. None of the other systems have "burped" in this method to date...that I know of. I think if you make a long rectangular one instead of circular it may help (diffuse along a larger water column than just the circle in one spot)...it would also help if the disk were right underneath the output of a filter (blowing down on it or across it).

POST SOME UPDATES PEEPS>>>>

[zapus]

The mesh on the stainless coffee filter may be too small, seems that it restricts water flow through it. Changed it out this evening for a filter bag that came with the cube, mesh size is slightly coarser than my fish net, but it seems to be holding CO2 ok.

[Curare]

Hey everyone, (first post)

I built something very similar not that long ago, I used a piece of filter foam at the top of a small cylindrical clear plastic canister ( I didn't want to see it)

It worked a treat, but over time (say 2 months) the filter foam turned to absolute crud, A grey indistinguishable mass of stuff.

Not good for letting C02 out finely if you ask me.

I personally like the idea of the coffee bell, that sounds like a goer in small tanks.

BTW, Fedge you and I are in the same boat, I've got a 10 gal that's being over wrought by reddish ludwigia repens!

hehehe...