Why anti-Perlite?I switched from DE to Perlite a while ago, and after some initial hassle due to the Supplier sending me the wrong grade i have not had any problems. My filters are faster with less pressure rise and cleanup is easier. I dont use near as much by weight either. One thing I noticed was that when filtering a beer with signifigant proportions of wheat in the grist (25% or more) you will get haze. Other than that no problems. If you are a brewpub brewer serving on premise I would think Perlite is superior. Maybe a production brewery who needs or wants the tightest filter possible would use DE but I wont touch it again. I actually talked to a brewer who doesn't like Perlite because he misses that subtle "DE" flavor.
"You are what you is." FZ