Welcome to Aquaria Central! Honestly I used to use it but quickly stopped because it looks exactly like the stuff that skimmers take out of the water and my skimmer would go like crazy absorbing all the stuff after it was put in (I tried this a couple of times to see), so now I only use Marine Snow by Julian Sprung I believe (or maybe Two little fishes, I can't remember off hand). Anyway, hope this helps and good luck.