Sera blackwater aquatan is a water conditioner with natural peat extracts, vitamines, trace elements and humin acids. Sera blackwater aquatan with the Bio-Protect Formula conditions tap water to dark, clear, fish friendly freshwater just like in tropic waters. Sera blackwater aquatan.https://www.aquaristikshop.com/aquaristic/Sera-blackwater-aquatan/387043/
- Stine S. wrote about Sera blackwater aquatan in 2017:
Made the water dark as tropical water. The fish loved it.