Tropical Querex Oak Bark Extract Water Conditioner 500ml

Tropical Querex is an oak bark extract designed for blackwater aquarium setups, helping recreate the soft, acidic water conditions found in South American and Southeast Asian river habitats. It acidifies water, reduces hardness, and introduces natural tannins that actively inhibit fungal and bacterial growth — making it a practical tool for keepers who want genuinely species-appropriate water chemistry rather than just treating tap water to a basic safe level.

What It Does

The tannins released by Tropical Querex replicate the effect of submerged wood and leaf litter in natural blackwater environments. These compounds lower pH, soften water, and create conditions that naturally suppress harmful microorganisms. This is particularly relevant when breeding softwater species or keeping fish that are sensitive to harder, more alkaline water.

Species It Benefits

• Discus and angelfish
• South American cichlids
• Characins (tetras and relatives)
• Colisa (gouramis)
• Corydoras and other softwater catfish
• Any species requiring soft, acidic blackwater conditions

Best Use

For the most effective blackwater replication, Tropical Querex works best alongside a peat-based conditioner such as a torfin complex product. Using both together delivers a more complete acidification and tannin profile than either product achieves alone. If you are building a dedicated blackwater biotope, consider pairing with catappa (Indian almond) leaf extracts or ketapang products for additional tannin layering.

Available in 500ml, Tropical Querex suits established aquariums where regular ongoing treatment is part of the maintenance routine. A well-managed blackwater environment takes the guesswork out of keeping demanding softwater species in good condition long-term.