Tetra pH/KH Plus
Tetra pH/KH Plus allows a precise and controlled increase of carbonate hardness (KH). The pH value depends on KH and carbon dioxide (CO2) content. If the CO2 level is constant, the pH value can only be influenced by the KH value. 
Tetra Capt’n Sharky LED Aquarium

A starter aquarium complete set to help you simply yet confidently take your first steps into the world of fishkeeping.