Higher flow / current in tank

[syburn]

Hi,

Whats the best way to achieve Higher flow / current in tank so as to distribute CO2 best.

A seem to find that the plants nearest the outlet pipe disipate the flow and seem to have more bubbles on them than any others.

[jacian]

You can add a powerhead in the tank.

[blue33]

If you notice those winner in competition, they have at least 2 external canister to circulate the whole tank flow, CO2 is distribute almost every corner.

[syburn]

I wonder if some sort of rainbar might help?

[Shadow]

I found that lily pipe can generate better flow than rainbar. Not sure whether it is true or just my feeling

[jacian]

I wonder if some sort of rainbar might help?

The types of outflow used will not acheive a higher flow or current. If you are referring to better circulation, the placement of the inlet/outlet and the hardscape will play a part here.

[blue33]

The types of outflow used will not acheive a higher flow or current. If you are referring to better circulation, the placement of the inlet/outlet and the hardscape will play a part here.

Yes. Agree with Jacian. The flow will be soften through rainbar as compare to one outlet alone, the circulation will definitely reduce. If you have massive plant grow then lily pipe is not suitable, i've try that and give up. If you notice most of Amano scape comes with alot of open space for circulation.

[AquaObsession]

More flow, more bba (observation)

Less flow, more bga (common discussion)

And now, both bba and bga are growing with a place of high flow. (observation)



Cheers, Christophe

[PeterGwee]

Aquatic plants are limited in CO2 due to the prandtl layer issue. The two methods to going about reducing that limitation is via water movement and raising the CO2 concentration.

Regards,
Peter Gwee

[Jervis]

The use of Lily Pipe outlet will get the benefit (as demonstrated by this pix) of recirculating back the tiny CO2 bubble that is floating on the water surface. When the CO2 is switched off at night, the same effect will introduce much needed oxygen into the water column.



But this effect is very much dependent on water flow (the flow rate of pump or canister filter) and water level.

[torque6]

another great shot from a dslr....

[blue33]

The use of Lily Pipe outlet will get the benefit (as demonstrated by this pix) of recirculating back the tiny CO2 bubble that is floating on the water surface. When the CO2 is switched off at night, the same effect will introduce much needed oxygen into the water column.



But this effect is very much dependent on water flow (the flow rate of pump or canister filter) and water level.

Was wondering "Surface Skimmer" have the same effect as it filter the surface layer and goes in the canister?

[Jervis]

Was wondering "Surface Skimmer" have the same effect as it filter the surface layer and goes in the canister?

I think it's better to recirculate the CO2 back into the water column instead of running them through a series of filtration media such as sponges, activated carbon and bacteria housing. That's just a personal opinion as I have yet to find any study specifically on this.

[benetay]

How about splitting the CO2? With 2 outlet at both ends or 2 tanks for 2 outlets. CO2 isn't very expensive & raising the concentration isn't that difficult. Some might use external reactor some diffuser. Those who want to DIY can put a diffuser inside an external reactor.( i've tried but it didn't boost the CO2 concentration by a lot.)


Cheers!