Hi,

Since not much information about Penac W available on the net, I like to share the information I got from the pamphlet which comes with the product.



Penac W/for aquarium

Penac W/for aquarium is a product specially designed for aquarium use by Plocher Vertriebs GmbH, Germany, based on its PLOCHER ENERGY SYSTEM. By sustaining the original oscillatory pattern of water, Penac W /for aquarium reactivates the aquarium water and stimulates the activities of aerobic bacteria which are essential for the balanced conditions within an aquarium. Applying Penac W/ for aquarium in the substrate at the 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 sludge decreases, which makes long term maintenance possible.

Usage

Using the supplied spoon in the package, simply add one level spoon (approximately 2 g) of Penac W / for aquarium for 60 lit. of aquarium water at every water change or regularly at an interval no longer than 4 weeks.

When applying to the substrate at setup, sprinkle Penac W/for aquarium evenly at the very bottom of the aquarium tank, beneath Power Sand, bacter 100, or Aqua Soi. The recommended dosage is : 3 level spoons for 60 lit. aquarium, 9 level spoons of 180 lit. aquarium and so on.

Cautions

The aquarium water becomes cloudy when Penac W/for aquarium is added directly. This is normal. With a filter functioning properly, this cloudiness disappears shortly
It is recommendable to remove excessive silt or sludge on the substrate on in the filter prior to the application of Penac W/for aquarium.
Store Penac W/for aquarium always dry on a wooden shelf or a board.

Ingredients

SiO2 99.2% Al2O3 0.42% Fe2O3 0.021% TiO2 0.03%
K2O 0.11% NaO2 0.01% CaO 0.02% MgO 0.02%

Since I like to experiment with ADA products (endorsed products too), bought several spoons of Penac W to see it for myself. No harms done, IMO

Best Regards