Carbon

[hookup555]

How often should carbon be replaced? Should carbon even be used in a tropical water fish tank?

 

[rodger]

In a typical tank it is only used for removing tannins or medication. So when your water isn't clear anymore from tannins, or after a few days for removing meds. Seriously, if you have adequate cycled filtration there is no need to use carbon.

 

[predatorkeeper87]

In a typical tank it is only used for removing tannins or medication. So when your water isn't clear anymore from tannins, or after a few days for removing meds. Seriously, if you have adequate cycled filtration there is no need to use carbon.

+1, carbon does nothing for your tank unless you are pulling meds out of the water after medicating.

 

[Yuki Rihwa]

To answer the question about replacing carbon then it does need to replace every 6 weeks, use it or not using it it's all about your decision.