Question about activated Carbon

Hey guys and gals,

I just bought some activated carbon(Black Diamond Premium Activated Carbon), it doesn't say how much per gal to use. I have some media bags that are reusable and are 800 micron. My question since I don't have any info via my purchase is how much carbon should I use per gal? I have a 90 gal tank with a 25 gal Sump. Also how often should I use or change the bags of carbon?

 

change it once a month .. fill the bag 3/4 full and put it in water flow .. make sure you thoughly rinse it in some ro water 1st so you dont get black in the tank .. hope this helps

 

I use about a 1/2 cup per 100 gallons and change it out every 5 to 8 weeks nothing engraved in stone though I just changed mine last Monday and that was the first time since I can't recall now LOL Black Diamonds is what I use also it has a good iodine and molasses grading for the reef aquarium on average .

 

Thanks for the information guys, it really helps out.