Co2 System

[mhancock]

I am adding a CO2 diffuser (CO2 from a 2kg fire extinguisher!) to a 225l tank. The water is extracted from the bottom right then comes back in on the top left.

Where would be the best place to inject CO2 - does it matter?

Thanks,


M

 

[mike455555]

id say where water is taken out of the tank under there so the bubbles go through the filter

 

[DrRob]

Basically, it needs to be spread evenly around the tank, and be properly dissolved. Generally they're nearer the filter outlet than inlet. Try a few places and move the drop checker around as well.

 

[mhancock]

thank you

 

[hensonc4098]

id say where water is taken out of the tank under there so the bubbles go through the filter

The only thing with doing this is that it can wear out the filter impeller more quickly. I put mine under the outlet from the filter if I'm using a diffuser. Then as the bubbles rise, they get blown about from the current from the filter. As DrRob said though, move your drop checker around the tank to make sure the CO2 is getting distributed evenly everywhere.

 

[mhancock]

id say where water is taken out of the tank under there so the bubbles go through the filter

The only thing with doing this is that it can wear out the filter impeller more quickly. I put mine under the outlet from the filter if I'm using a diffuser. Then as the bubbles rise, they get blown about from the current from the filter. As DrRob said though, move your drop checker around the tank to make sure the CO2 is getting distributed evenly everywhere.

I've actually put it at the bottom of the tank, just ABOVE where the water leaves for the filter. The tank is about 50cm high, so most of the bubbles seem to have dissolved before they get to the top of the tank, so I assume lots is being absorbed by the water. This means it does not feed straight into the filter at all.

I could move it to by the water return, but this would mean that all the pipework is exposed rather than hidden - and after all, we do like our tanks to look good

 

[Ps3Steveo]

I'd move the inlet so its below the outlet, that way the water travels right round the tank and back in, then put the diffuser below the outlet or on the opposite side of the tank low down so as the water goes to the opposite side and is pushed down it will push the CO2 down and have less chance of rising straight to the surface. This is just an opinion but always worked for Mr Amano and I always set mine up this way.

 

[mhancock]

I'd move the inlet so its below the outlet, that way the water travels right round the tank and back in, then put the diffuser below the outlet or on the opposite side of the tank low down so as the water goes to the opposite side and is pushed down it will push the CO2 down and have less chance of rising straight to the surface. This is just an opinion but always worked for Mr Amano and I always set mine up this way.

Sounds like a great idea, however the design of the hood would not allow this!

 

[hensonc4098]

If there is no flow above the CO2 bubbles then they won't be dispersing around the tank properly - your drop checker will show you this. You need it in an area of high flow. If you dislike the look of the pipework in the tank, look at using an inline atomiser instead.

 

[Ps3Steveo]

I always put mine in an area with least flow to make sure the CO2 it getting there, that way I know its fine in all the other areas.