API pH Down 118ml is a reliable liquid solution formulated to help you lower the pH level in freshwater aquariums when it drifts above the ideal range for your fish and plants. pH is a critical measure of water chemistry — too high and some species may become stressed or unhealthy — so this product gives you a convenient way to bring pH down safely and effectively when needed.
Key Features & Benefits:
🔻 Lowers pH in freshwater tanks: Helps make aquarium water more acidic when pH readings are higher than desired, creating a more comfortable environment for many freshwater fish species.
💧 Fast‑acting & colourless: The clear liquid works quickly without clouding or colouring the tank water, so you maintain crystal‑clear visibility.
🐠 Fish‑ and plant‑safe (when used as directed): Phosphate‑free and nitrate‑free formula won’t encourage algae growth and is gentle on aquatic life.
📏 Easy to dose: Add measured amounts based on water volume and re‑test pH before additional dosing to adjust gradually and avoid stress to fish.
When to Use It:
Use API pH Down after testing your aquarium water with a pH test kit (like the ****) whenever pH levels rise above the optimal range for your aquatic species — common after water changes, tap water additions, or natural fluctuations in tank chemistry.
Pro Tip: Make adjustments gradually (avoid large shifts in a short period) to minimise stress on fish.
We offer FREE Tracked Delivery on orders over €49 and up to 30kg in weight.
For orders under €49 we apply a simple flat fee of €4.95 for TRACKED delivery on all parcels up to 30kg anywhere in the Republic of Ireland or Northern Ireland. No surprises and excellent service.
On our new recurring delivery service, we offer FREE Delivery on all orders over €29. Just choose recurring delivery on any applicable product
Please note an additional charge will incur for orders over 30kg in weight.
Orders are processed Monday to Friday (excluding public holidays) and you should receive your order within 2-5 working days. If we have any issue with the stock, size or colour of any of your products we will contact you via phone or email.
