I've not tried it with Purigen and I've not even used Purigen (although I think it is a good product), but I don't see why you couldn't mix them and use the mixture in the one reactor. I've mixed GAC and GFO that way.
Right now I'm running chemipure elite in my cpr aquafudge 2 and I just started that a week ago and I've got a little bit of cyano in there and a little bit of algae on my rocks and I was using city water and I'm switching to rodi water now but it's gonna take some time to get it switched over but what should I do about this algae will the chemipure elite take care of it or do I have to run something else and my nitrates are at 15 and phosphate are at .036
Yes I basically do I use the bags still but I run a dual brs reactor with phosguard and matrix carbon in one and purigen in the other I also run the tlf 150 with matrix biological media. I stack the bags with a sponge pad between them and on top.