Creative aquascape union guys use it.. T.Amano is reputed to use it..Very grand claims about the W..
Here is the product description.. and content..
"Penac W helps to improve conditions within the substrate environment. I use Penac W and Penac P on every setup without fail. It works by sustaining the original oscillatory pattern of water. Penac W reactivates the aquarium water and stimulates the aerobic bacteria which are essential for balancing conditions within an aquarium. Applying Penac W in the substrate setup increases the amount of dissolved oxygen and activates the aerobic bacteria within the substrate. As a result the hardening of the substrate is prevented and amount of of sludge decreases which makes long term maintenance possible.
Usage: Using the supplied teaspoon simply add 2 level spoons (approx 2g) of penac for every 60L. Sprinkle powder of Penac W at very bottom of the substrate layer at setup stage beneath Power Sand, AquaSoil or Bacter 100.
Ingredients: SiO2 99.2%, K2O 0.11%, Al2O3 0.42%, Na2O 0.01%, Fe2O3 0.021%, CaO 0.02%, TiO2 0.03%, MgO0.02%"
Si02 is quartz/glass no? Many on planted tank forum have said this is Bentonite... Is that true?
As for the P I have not been able to source its analysis just as yet.. I feel like it's the magical amano fairy dust with such promise... Or worse yet magic beans.. I want to believe...Ahha x files....
For those who like research here are some statistics on some of their products tested on a large scale in Vietnam
http://katharosenviro.com/17_Plocher...mese_study.pdf I wonder if Amano now owns this line as it must have been a large scale product in 1998 when these tests were done