The API Copper Test Kit, measuring free and chelated copper from 0 to 4ppm, essential for safely dosing copper-based medications in aquariums and ponds.
The API Deluxe pH Test Kit with Liquid Adjusters, an all-in-one way to test and safely adjust aquarium pH, with separate pH up and pH down options available for larger pond volumes.
The API Freshwater Master Test Kit, used in-store for our free water testing, covering ammonia, nitrite, nitrate, pH and high-range pH in one comprehensive kit.
The API GH/KH Hardness Test Kit for monitoring general and carbonate hardness, useful for tracking down the cause of unstable pH in aquariums and ponds.
The API High Range pH Test Kit, designed for marine tanks, African Cichlid setups and naturally alkaline water where standard pH kits aren't accurate enough.
The API Nitrate Test Kit for freshwater and saltwater aquariums, an important first step in troubleshooting fish health when ammonia or waste build-up is suspected.
The API Nitrite Test Kit, checking for the second stage of the nitrogen cycle when pH and ammonia read fine but fish still seem off. Nitrite is deadly to fish even at low concentrations.
API Pond pH Up, safely and quickly raising pH in freshwater ponds testing too acidic, helping prevent the stress and illness that unstable pH can cause fish.
The API Phosphate Test Kit, measuring phosphate levels in fresh and saltwater aquariums, a key first step in tackling algae since phosphate is a primary food source for it.