Would an Eheim 2213 be suitable?

[Ormarr]

For a 50g medium/heavy planted tank with high light and pressurized CO2?

Also, should I avoid using the Aquaclear 110 I was thinking of using for this?

Thanks!

[dan2x38]

Some people use both a canister & AC filters. You can't over filter. Also depends on your bio-load. Remember carbon in a filter removes trace nutrients & others too.

[Ormarr]

In terms of CO2 outgassing.  Would an AC110 be a problem?

[dan2x38]

In terms of CO2 outgassing.  Would an AC110 be a problem?

By agitating the water surface a lot it can increase gassing out faster yes. As for an AC110 doing that it would depend on the location for one related to a CO2 diffuser if in tank. Also the water level determines how much splash. You can reduce the flow on the ACs. Finally, likely the plant gurus here have a lot more advice & tips.

[charlie]

For a 50g medium/heavy planted tank with high light and pressurized CO2?

Thanks!

Yes a 2213 would suffice.

Also, should I avoid using the Aquaclear 110 I was thinking of using for this?

As much as possible , the cascading effect ( water from the filter flowing to the tank ) will cause the co2  to outgas ( How much i don`t know ), more so on the AC110/500 which moves a lot of water.  That said , you can increase the flow of the co2 to compensate for the outgasing, but you will be burning up a lot of co2 .

Use a spray bar under the surface of the water to  help retain the co2 gas (  a little ripple on the surface without breaking the surface is also good.
Regards

[Aquaviewer]

The trick is mainting good O2 levels while minimizing Co2 loss.  One of the advantages of HOB filters is the fall of the return is efficient at agitating the surface for O2 exchange which is why they can run counter to the objective of injecting CO2.

The outflow of canister filters can give you more options for maintaining good flow in the tank while limiting the surface agitation because they can be mounted below the surface.  The flow will help maintain O2 levels by turning over the water column, while limiting off gassing with surface agitation.  I'm not sure about the 3312, but you can get different configurations for the return nozzles for a number of Eheim models to create different flow patterns.

[BigDaddy]

If you are going to use a power filter, the AC's are the best for CO2 injected tanks.  With the water level properly adjusted, they cause the least amount of surface disruption and outgasing.

I've run ACs on CO2 injected tanks in the past, and never had to worry about substantial CO2 loss.

[BigDaddy]

As well, a lot of people underestimate the amount of flow required for planted tanks.  Most people thing you need almost still water to keep the plants growing nice.

Couldn't be further from the truth.

Good CO2 dispersion, as well as dispersion of nutrients in the water column, only happens with decent flow.  Yes, you don't want your plants being whipped back and forth, but you don't want near still water either.

The combo of the 2213 and the AC would provide you with redudant filtration and improved flow.  I wouldn't hesitate to use both if you have no other use for the AC.

[Ormarr]

I do have a power head as well I could use.  Would that be too much of a disruption to the plants?

[BigDaddy]

The powerhead, canister and filter might be a bit much... it might not.  You may have dead spots due to rockwork or driftwood.

The canister MAY be enough on its own.  The canister and the AC are LIKELY enough.  Every tank is different though.