Opions on Canister Filters

[Jeff1192]

Now that I am using pressurized CO2 I think it would be best to get rid of my AC 110 and replace it with a 2nd canister filter. I figure all that surface agitation is costing me a lot of CO2. So I currently have an Eheim Pro II running on the tank and I'm trying to decide between the Eheim 2215 and the Eheim Ecco 2236 for a second filter. Anyone with experience with these have any pros or cons? Or any other suggestions for a good second canister filter?

Thanks,

Jeff

[zima]

What size is the tank you are filtering? Is one of the canisters going to be connected to an external CO2 reactor (how are you dissolving your CO2)? depending on the size of the tank and whether or not one is connected to a reactor, you could get away with a smaller Eheim (the 2213)..

I'm running two cannister filters per tank on my larger tanks (55g and 75g). One Eheim per tank, plus some other inferior cannisters  . Eheim filters are the best in the hobby, I would argue. Quiet, reliable, low-maintenance, provide excellent filtration. Highly reccomended.

As per surface aggitation=loss of CO2, you got that right. I used to pump CO2 like crazy (we're talking bi-monthly refills of a 10 pound tank on a 55 gallon!) until I learnt to keep the surface still.

[fischkopp]

I find that the surface agitation of AC is quite low as long as the water level in the tank is high enough that the return sinks in. I run three tanks like this (AC & pressurized) and dont have any issues - just recently refilled the first time after setting it up in February.

That said, canister filters with submersed return will always be better and your first choice. 

[Jeff1192]

What size is the tank you are filtering? Is one of the canisters going to be connected to an external CO2 reactor (how are you dissolving your CO2)? depending on the size of the tank and whether or not one is connected to a reactor, you could get away with a smaller Eheim (the 2213)..

I'm running two cannister filters per tank on my larger tanks (55g and 75g). One Eheim per tank, plus some other inferior cannisters  . Eheim filters are the best in the hobby, I would argue. Quiet, reliable, low-maintenance, provide excellent filtration. Highly reccomended.

As per surface aggitation=loss of CO2, you got that right. I used to pump CO2 like crazy (we're talking bi-monthly refills of a 10 pound tank on a 55 gallon!) until I learnt to keep the surface still.

I'm running the Pro II with an AquaMedic 1000 diffuser on my 90 gallon tank.

Jeff

[zima]

Is the AquaMedic 1000 connected to your output in input? Either way, if you are satisfied with the flow rates on the Eheim Pro, I'd say an addition of a small Eheim 2213 is more than enough (and I am a fan of over-filtration!). I would even go with a small-medium cannister other than Eheim, like Fluval 204 or 304 - cheaper, unless you could get a nice (cheap) used 2213 on the forum.