08-29-2006, 06:17 PM
Join Date: Apr 2006
Location: Boston, MA
iTrader Positive Rating: 100%
I have the 2213 on my 29 gallon and use it as a CO2 diffusor too, I just drilled a small hole in the existing strainer over the intake tube and slid the CO2 tubing up into the intake. A few observations though:
- With 2 2L DIY CO2 bottles, the filter cannot keep up and every few hours will make a loud whooshing noise as tons of CO2 is chopped up by the impeller. Hopefully this is not damaging to the filter! Time will tell...but no way to adjust DIY CO2.
- The intake strainer is small enough that only newly hatched fry would be sucked up, and even then, the 2213 does not have a ton of suction (my guess is it only pumps around 80-100gph once "broken in" a.k.a slightly dirty). So unless this tank is a breeder tank, I wouldn't worry about a sponge, which will be a big hassle removing every 2 weeks, not to mention potentially damaging your filter. (more on this below)
- If your tank is heavily stocked (as is mine) a 2213 is not going to cut it. Mulm is suffocating my hairgrass on the opposite side of the tank as the filter output as the filter just doesn't have enough flow to remove all the solid waste.
Having had a shrimp tank (RIP Cherries), I have to agree with Hoppy partially. Having anything with a sponge over the intake, like a filter or powerhead is a real
pain in the butt though. Even in my shrimp only tank, the sponge was clogged every other week, reducing flow to a trickle. This is really stressful on your filter motor and can cause it to burn out and overheat (admittedly much cheaper to replace if its just a powerhead). If you are concerned about little babies and shrimp being sucked up, use a sponge filter driven by an air pump instead. This is plenty of filtration, even for a tank without the filtering capacity of plants and there is no danger of suction. It even provides a source of food for babies. If you, like me, are worried about the ugliness of a sponge filter, try the Jebo sponge filters, which mount on the side of the tank and are like pillars instead of huge doughnuts that take up valuable real estate. They are not the most CO2 friendly filters though due to surface agitation.