add a second filter

[Jlorenzo]

will this start cycling over? I have a 40g tall with the topfin hang on back and I want to add a aquaclear 30

[annageckos]

Are you planning to run both filters? If so than no, it will not restart the cycle. If you only want the new filter than leave both run together for a month or so to let the new filter start a colony of bacteria. Or you could switch the old media into the new filter if you are planning to get rid of the old filter.

[Jlorenzo]

I figure I might as well run both.

[lowlight]

I agree with annageckos. Running both filters for a month won't start the cycle over and since you plan on running both filters you will actually have more beneficial bacteria.

[rich311k]

If you just add the second filter you will have no cycle interruptions. Once it is seeded in a month or so you will have redundancy, which is always nice.

[Jlorenzo]

I suppose I could get rid of the topfin filter once the aquaclear is cycled. I really dont think its doing the job, which is why I got the second filter. I had one of my other aquaclears from my 30 gal on the tank I'm talking about now (my 40g tall) and I noticed a significant difference in water clairity.

[lowlight]

I would do what ever works best. I would keep the Topfin for a back up filter though. Better safe than sorry.

[King Tut]

I would keep both as long as the topfin is doing something. I run 2 aqueon 55's on my 45 tall and couldn't be happier.

[bushwhacker]

run em both as long as the original filter has water going thru it its working, may not be doing great but its still filtering