When to run carbon

[Andy_P]

Currently have a 13.5 gal and 20 gal nanos. Just got the 20 and currently running a cycle on it now. Filtration is out until the cycle completes, but my question is when/if I need to run any carbon moving forward after the cycle. I run pretty heavy weekly water changes on the 13.5, 50%+, but want to try and keep the 20 to a 10-20% weekly change. I was looking at either a bag or carbon sponge in a caddy for the 20, but I'm curious as to if carbon is a must or not.

 

[Lavey29]

It's not a must. Some people swear by it others choose not to run it. Just a personal choice. If you do choose to use it just use high quality rox carbon.

 

[Rmckoy]

I was always told and have read many times if you take water from your tank and put in a white bucket . If the water is yellow it’s time to change carbon