API pH Up 37mL
The API pH Up 37mL is a reliable water conditioner designed to safely raise and stabilise pH levels in freshwater aquariums.
Maintaining the correct pH is essential for fish health, biological filtration performance, and overall aquarium stability. If your tank’s pH is testing too low, API pH Up provides a controlled way to increase alkalinity and create a more suitable environment for your livestock.
The compact 37mL bottle is perfect for smaller aquariums or for fine-tuning pH adjustments with precision dosing.
Key Features:
- Raises Aquarium pH Levels Safely
- Helps Stabilise Water Chemistry
- Easy Liquid Dosing – Controlled, gradual adjustments
| Specification | Value |
|---|---|
| Volume | 37mL |
| Use | Raises and stabilises pH in freshwater aquariums |
| Form | Liquid |
FAQ
How often should I use API pH Up in my aquarium?
The frequency depends on your tank’s current pH and desired adjustment. It is recommended to make small adjustments every few days and monitor pH levels closely to avoid over-correction.
Can API pH Up be used in saltwater tanks?
No, API pH Up is designed for freshwater aquariums only and should not be used in saltwater systems.
Does API pH Up affect water hardness?
API pH Up primarily raises pH by increasing alkalinity and does not significantly alter water hardness.

Christopher Lawrence –
I used API pH Up after my tank’s pH dropped below 6.0. It worked smoothly and brought the level up to 7.0 within two days. The dosing is easy and the bottle is compact, perfect for my 10-gallon tank. My fish seem more active and less stressed since the change.
Sean North –
Good product for small tanks. I added a small amount every 3 days and noticed a steady improvement in pH. The liquid is easy to measure and the effect is consistent. Not a quick fix, but reliable over time.
Sebastian Marshall –
My aquarium had fluctuating pH levels. After using API pH Up regularly, the readings stabilized. The 37mL size is just right for my setup. No side effects on my fish or filter performance.