I've read a lot of mixed opinions about this subject, so I'm hoping for some clear advice.
I have Tetra Whisper filters for 10g and 20g tanks. The packaging always says to replace it every month, which I believe is way too often. I've seen people on the forums say they change it anywhere between 1 month to 1 year.
I haven't changed my filter in about 10 months now, and my water quality is still good and the water is clear. I rinse it weekly (swishing it in water). However, the cartridge does look really dirty and it's completely brown. The carbon inside is probably useless at this point too (although I've heard the carbon can wear out after only 3 days). There is also a little bit of algae growth on it.
Also, since there is a load of beneficial bacteria on the used filter, how do I safely change to a fresh one? My tank has been stable for quite some time and I'm afraid changing the filter will cause a drastic change.
I have Tetra Whisper filters for 10g and 20g tanks. The packaging always says to replace it every month, which I believe is way too often. I've seen people on the forums say they change it anywhere between 1 month to 1 year.
I haven't changed my filter in about 10 months now, and my water quality is still good and the water is clear. I rinse it weekly (swishing it in water). However, the cartridge does look really dirty and it's completely brown. The carbon inside is probably useless at this point too (although I've heard the carbon can wear out after only 3 days). There is also a little bit of algae growth on it.
Also, since there is a load of beneficial bacteria on the used filter, how do I safely change to a fresh one? My tank has been stable for quite some time and I'm afraid changing the filter will cause a drastic change.