I've already purchased the second bag this filter gravel. The gravel is perfectly suited for washing for every AQ. I use it in all my pelvis and has been for more than 1 year. The usual gas formation with> 5cm deck level is normal, the gravel turns relatively slowly. The compatibility of the animals and plants is without complaint, all fish (L-catfish, armored catfish, loaches) and invertebrates (CPOs, prawns) feel comfortable, ground plants grow properly and form solid roots.
The price per kilo is unbeatable against specific aquarium gravel from the animal dealers.
Strong buy recommendation for all aquarists who want to use a bright gravel in their tank!