I know I do not need it but it does seem to have some positive effects but these are subjective conclusions based only on my perception of the discus' reactions.
I have also used it in conjunction with spawning set ups.
I have seen and ignored this thread since it went up, thinking "everyone uses carbon...what else is there?" I read it because it kept moving up. I wish I had read it earlier.
Can anybody provide more info on these products, Purigen, ceramic rings, and Renew. Are these brand names or items (like we say carbon)? I use Emperor external filters on all my 20, 29, 55, 75, 95 gal tanks. Only my 10 have sponge filters. Can these products be used w/Emperor ext. filters? Where do I find these things? Finally, any other info you find needed for some one that has never used such products.
Thank you
g