Carbon

I haven't used it on any tanks in at least 10 years! It is best kept for removal of meds or discoloration of water and that's all IMO.

Ray

I don't use it either....only when it's absolutely necessary.

Seachem Purigen I do use though.

I don't use it at all. I use chemizorb or purigen.

I don't use any of the above whatsoever.

I like the sound of this Purigen (never heard of it before), especially the line in the seachem website which says "It polishes water to unparalleled clarity." I have been rather annoyed with the amount of suspended matter in my water of late so might give it a go. Its a bit pricey though. Do you need much of it?? As it appears to control nitrates maybe it could be added to a filter before taking a vacation to keep the nitrates down.

For water clarity, you would be better off with a micron filter pad or regular change of filter floss in your filters.

Any kind of absorbtion media, Carbon, Chempure, and even Purigen is going to help with clarity, but I think in the long run a micron filter pad would be best.

What I have seen some people do, is pack a Eheim Canister with Polishing Pads, filterfloss, and a 100 micron pad. Then run that for a day or two to polish the water.

I have used Chempure for polishing, and nitrate reduction, and it does help. It does work. Nothing beats a good waterchange though for total nitrate reduction.

Purigen does do a good job at polishing the water and nothing beats a Magnum350 or HOT when it comes to mechanical "polishing".