Very practical and simple to use. An always healthy aquarium with these refills.
good filter. Duration longer than 4 weeks for my fish and the aquarium remains relatively clean
Perfect and nickel for my 60-liter aquarium filter ... This Crystal is effective and even more so by doubling it. I recommend this product.
Conform to the product description on the site. Price a bit high.
I use this product for 3 years in alternation with API prevente algae and the water of my aquarium is always clear.On not find this product everywhere and I hope to continue to get it because it is perfect.
Product shot cheaper. very satisfied. I order it regularly