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Activated carbon (GAC) quality differences

Alexander1312

Alexander1312

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(corrected/photos previously uploaded in the wrong order)

I normally pour hot RODI water over the carbon a few times before I put it into my tank, to remove the finer particles. I always use the same type of carbon for this - left picture.

Today, I did the same with another carbon product (right picture), which normally does not get into the tank but sits on top of the skimmer to absorb ozone. This is the first time I did it with this product because it always releases a bit of dust on the skimmer cup, and with my OCD regarding GAC's impact on tangs, I wanted to further reduce this. There was a distinct smell from this and the reddish color you can see in the picture.

Fair to say, I will continue to use this (cheaper) carbon for my skimmer air filtration but would never put it into my tank.

(btw, if you think this comes from the bag it was in, the answer is no since I typically do the exact thing with the carbon in the left picture inside the same bag, and have been doing this every month for the past 18 months now, without any odor etc)

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What the heck. Looks like it had GFO mixed in.

If you're worried about fines, I've been putting my carbon bag in a filter sock and hanging it in my sump, so they can't get out.
 
Darkxerox said:
What the heck. Looks like it had GFO mixed in.

If you're worried about fines, I've been putting my carbon bag in a filter sock and hanging it in my sump, so they can't get out.
Click to expand...

That's how it smelled, in my opinion. This was the carbon btw that folks should not add into their tank - https://premiumaquatics.com/collect...3&_sid=5dbbbd915&_ss=r&variant=47329510818034

And I would recommend to test your own carbon with hot RODI. This carbon looked and smelled perfectly normal in its original condition.

I am not a fan running carbon without a dedicated media reactor as the return flow far exceeds what is recommended for carbon, creating much more grinding issues. The sock offsets this problem probably to some extent but then I would need the dreaded filter sock. I have just set up my second DELTEC media reactor with the sicce syncra silent 0.5 at the lowest setting, which still feels a bit strong, but the sicce nano pump felt too flimsy, so will try this for now.
 
Darkxerox said:
What the heck. Looks like it had GFO mixed in.

If you're worried about fines, I've been putting my carbon bag in a filter sock and hanging it in my sump, so they can't get out.
Click to expand...
That's how my Rowaphos often looks wondering if they had it packaged wrong or bad batch etc. I use carbon as well never seen any that look like that beyond the Rowaphos or chemipure which has gfo in it as well.
 
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