API pH Up
API® pH UP pH adjuster raises pH levels in your aquarium to make water more alkaline when levels fall too low. pH is the measure of acidic or alkaline conditions in water, where a value of 7.0 corresponds to a neutral pH, pH values about 7.0 are considered alkaline, and pH values below 7.0 are considered acidic. Different fish need different pH levels to be healthy, so it is important to test your water regularly to ensure pH levels fall where they should. pH UP pH adjuster is fast-acting, colorless, easy to use, and will not cloud aquarium water. Because it is phosphate-free and nitrate-free, pH UP pH adjuster will not encourage algae growth.
Ingredients:
| Ingredient | Details |
|---|---|
| Calcium carbonate | Primary alkaline agent |
| Phosphate-free | Prevents algae growth |
| Nitrate-free | Safe for fish and plants |
FAQ
How does API pH Up work in an aquarium?
API pH Up works by introducing alkaline compounds that raise the pH level of aquarium water. It is fast-acting and dissolves completely without clouding the water.
Is API pH Up safe for fish and plants?
Yes, API pH Up is safe for fish and plants because it is phosphate-free and nitrate-free, which helps prevent algae growth and maintains a stable environment.
Can I use API pH Up regularly?
Please contact customer service

Jacob Wilson –
I’ve used API pH Up for two months now and my aquarium pH has stayed stable. The water remains clear and my fish seem more active. No algae issues either. Easy to mix and effective.
Andrew Mackay –
It works well when pH drops suddenly. I test water weekly and add a small amount when needed. The product is colorless and doesn’t affect water clarity.
Joe Lyman –
Great for maintaining alkaline conditions in my community tank. My fish have not shown any stress signs since using it. No cloudiness or algae growth observed.