co2 for sump setup

hi, just got a new tank with external sump. would i have problems with using co2? i read that most of it will be wasted due to the overflow and agitation at the sump...

Usual practice for planted tank is to use canister filter to prevent CO2 loss, using a sump tank will only waste a bit of CO2 due to more water surface agitation.

roughly how much will it waste? don't want to buy one canister of co2 then everything goes back to the air...

Not too sure how much will dissipate into the air, depending on the flow rate of your pump, i think will be quite substantial as the plants needs time to absorb the dissolved co2 during photo period.

Originally Posted by noxon

roughly how much will it waste? don't want to buy one canister of co2 then everything goes back to the air...

hi bro! a bit kua zhang la. i dont think everything will go back to the air lah..

hahahaha..

[LimBeh]

Actually depends on what is your CO2 setup, if you use a reactor or you introduce CO2 into the tank via your pipeline, then not too bad ...

[Jon-san]

Best is to use a reactor or an inline diffuser that can dissolve the CO2 completely. Less wastage then. Also, try to reduce the chances of surface agitation, eg, having your return outlet below your water level, raising the overflow compt water level up with the use of a standpipe. Wastage is unavoidable with a sump setup, your best option is simply to reduce the level of wastage.

Another option is to inject CO2 using an airstone placed at the return pump. The CO2 bubbles will get sucked into the pump and mixed in the return flow.

If you do not get a standpipe, you can adjust the inflow valve, so that the water level in the overflow compartment is maintained at the water line.

Planted tank with sump tank is possible, just that you have to make some adjustments.

Sump tanks are usually for larger tanks (what is your tank size)?