Filter media, how often do you really need to replace it?

[NilusFishFamily]

Keeping hearing different opinions and time frames on when to replace filter media and just looking for a straight answer

Mechanical - I have heard everywhere from changing sponges monthly to never changing your sponges unless they begin to fall apart.

Biological - I always thought you never replaced this once the tank cycles(unless you get a fish wiping disease in your tank or such) but I have seen things that say 6 months

Chemical - I know this differs between what chemicals you are using. With active carbon(which is really all I use unless there are problems) I have heard anywhere from 1 to 3 months.
Just trying to get a good gauge on how often things need to be changed. We are setting up a new tank and I want to make sure we get on a good schedule and keep things running well.

 

[fishguy1978]

I do not replace sponges or biological unless it is falling apart. I do not use carbon but monthly would be best. Carbon can begin leaching filtered elements back into the water column if left to long.

 

[tlindsey]

Keeping hearing different opinions and time frames on when to replace filter media and just looking for a straight answer

Mechanical - I have heard everywhere from changing sponges monthly to never changing your sponges unless they begin to fall apart.

Biological - I always thought you never replaced this once the tank cycles(unless you get a fish wiping disease in your tank or such) but I have seen things that say 6 months

Chemical - I know this differs between what chemicals you are using. With active carbon(which is really all I use unless there are problems) I have heard anywhere from 1 to 3 months.
Just trying to get a good gauge on how often things need to be changed. We are setting up a new tank and I want to make sure we get on a good schedule and keep things running well.

I have been using sponges and bio media for years. On a couple aquariums estimate 10 yrs or longer lol. I personally don't use carbon.

 

[tlindsey]

I have been using sponges and bio media for years. On a couple aquariums estimate 10 yrs or longer lol. I personally don't use carbon.

I'm using Bio-Balls that were used in the late 90's for Saltwater.

 

[kno4te]

Keeping hearing different opinions and time frames on when to replace filter media and just looking for a straight answer

Mechanical - I have heard everywhere from changing sponges monthly to never changing your sponges unless they begin to fall apart.

Biological - I always thought you never replaced this once the tank cycles(unless you get a fish wiping disease in your tank or such) but I have seen things that say 6 months

Chemical - I know this differs between what chemicals you are using. With active carbon(which is really all I use unless there are problems) I have heard anywhere from 1 to 3 months.
Just trying to get a good gauge on how often things need to be changed. We are setting up a new tank and I want to make sure we get on a good schedule and keep things running well.

Had my lava rock in the filter for years. Otherwise only changing out the filter floss. Don’t use any chemical media.

 

[duanes]

I agree with the others, I have used some of the same bio-media for over 40 years, and only toss mechanical when it falls apart, and never use carbon. I do regularly rinse grunge off bio-media with tank water.
Of course if some hard to get rid of disease comes along, I'd either sterilize media or toss it, whichever more convenient at the time.

 

[Raka]

No carbon unless medicating a tank, I seem to have a bunch a "filter bags" full so I just use once and toss.

I have never replaced my media in about 5 years, only buy new when another tank is setup. Sponges I clean until I am feeling super lazy or I see a killer sale. Price match Petsmart and Chewy for this, usually get 6mo to a year out of them, however they could go longer if I kept cleaning them.

 

[esoxlucius]

The straight answer is, and I think we have a pretty much overwhelming landslide in opinion, is that mechanical and bio media need never be replaced, or very very rarely, and that carbon is pretty much redundant in the vast majority of systems.

Personally the only media that I regularly replace with new is my filter floss (mechanical). It's as cheap as chips and can't really be rinsed clean even if you tried.

My poret sponges (mechanical) get thoroughly rinsed under warm tap water on maintainance days. These sponges are currently showing no signs of polymer degradation whatsoever, they could well last for years and years.

And my bio media of choice is bio balls and ceramic rings, all bagged up. These hardly get touched, let alone replaced! They just get a light swish in tank water once or twice a year to remove any crud, which helps promote healthy BB growth.

If you need to replace your media on a regular basis either you are doing something wrong or the actual products you are using must be really inferior.

 

[Niki_up]

I keep sponges over my filter intakes and I find they degrade quickly (maybe bc they grow algae and the algae breaks them down or maybe I’m more aggressive with them when rinsing them)

other than that I do not replace any media. I only use sponge, ceramic rings, and lava rock.

 

[jjohnwm]

I never change my carbon because I don't use any.

Biomedia might get a quick rinse every few years if convenient...if not, no.

Mechanical is almost always foam for me. Cheap foam might start to fall apart after a few months or years of squeezing/rinsing a couple times a week. Quality stuff like Poret lasts pretty much forever. Any foam will last longer if you avoid squeezing it; just pressure-wash.

Matten filters are a special case; a giant sheet of foam (I use Poret) that, depending upon stocking levels, feeding, etc. can go many months or years with literally no maintenance outside of vacuuming the surface during regular maintenance. The catch...and there's always a catch ...is that all waste material undergoes decomposition/breakdown in the tank so nitrates accumulate much more quickly than tanks whose mechanical media is frequently cleaned, removing the organic matter before it breaks down. If you like changing water, this isn't a big deal, especially with low stocking densities of small fish. Not really ideal with monster fish.