No fertilizazion and no CO2 dispenser system.
The partial water changes are made with water from the river Ticino.
The river Ticino born in Switzerland and runs over 100 km in North Italian territory.
Biotope Aquarium river Ticino
nr. 7 Alburnus alburnus,
nr. 5 young Rutilus aula,
nr. 1 Padogobius martensii.
Prodac Fertil Plant covered with 20 kg of crop in the Ticino river bottom (sand and gravel). All the rocks and the driftwood (and the water and the leaves and the plants and the animals too) I've taked in the river Ticino.