Free standard shipping on every U.S. order · Free 30-day returns
New here? Take 10% off your first order with code WELCOME10
Free standard shipping on every U.S. order · Free 30-day returns
New here? Take 10% off your first order with code WELCOME10
Free standard shipping on every U.S. order · Free 30-day returns
New here? Take 10% off your first order with code WELCOME10
Free standard shipping on every U.S. order · Free 30-day returns
New here? Take 10% off your first order with code WELCOME10
Free standard shipping on every U.S. order · Free 30-day returns
New here? Take 10% off your first order with code WELCOME10
Free standard shipping on every U.S. order · Free 30-day returns
New here? Take 10% off your first order with code WELCOME10
Free standard shipping on every U.S. order · Free 30-day returns
New here? Take 10% off your first order with code WELCOME10
Free standard shipping on every U.S. order · Free 30-day returns
New here? Take 10% off your first order with code WELCOME10
Free standard shipping on every U.S. order · Free 30-day returns
New here? Take 10% off your first order with code WELCOME10
Free standard shipping on every U.S. order · Free 30-day returns
New here? Take 10% off your first order with code WELCOME10
Free standard shipping on every U.S. order · Free 30-day returns
New here? Take 10% off your first order with code WELCOME10

Orders are prepared in 1–3 business days and arrive 3–7 business days after they ship. Alaska, Hawaii, Puerto Rico and remote addresses can take longer. You get a tracking number by email as soon as your order ships.
You can return an item within 30 days of delivery, no reason needed. We email a prepaid return label; items should be unused and in their original condition. Your refund goes back to your original payment method within 10 business days of us receiving the return.
If you have a question about an item or your order, email othercenter.us@gmail.com with the product name or order number. We answer every message by email and reply within 1 business day (Monday to Friday).
API Freshwater Master Test Kit is a freshwater aquarium water-testing kit designed to monitor key water conditions, with supplies for 800 tests and readings for five parameters.
Water conditions can change before a problem is visible. Fish waste, uneaten food, other organic matter and untreated water can affect aquarium levels, so regular testing gives freshwater keepers a way to check conditions and identify when action may be needed. This kit is intended for monitoring, with results compared against its color card and recommendations provided on the card.
The kit tests pH, high range pH, ammonia, nitrite and nitrate in freshwater aquariums. These readings cover water parameters that can shift as waste and other organic material build up, or when untreated water is added. Monitoring them helps you recognize changes that may create harmful conditions for fish.
Fill a test tube with aquarium water, add the testing drops and compare the resulting color with the card. Use the card’s recommendations to guide any next steps when the result calls for action. The kit is intended for weekly monitoring and for checking water when fish or water problems appear.
This single kit contains seven bottles of testing solutions, four capped test tubes, one holding tray and one laminated color card. It is designed for freshwater aquariums, including tanks kept for tropical community fish, cichlids and goldfish. Good to know: this kit is for freshwater use only.
API Freshwater Master Test Kit suits freshwater aquarium owners who want a repeatable way to check key water conditions during routine care or when a concern arises. Its five-parameter testing range, color-comparison card and supplies for 800 tests make it a freshwater-focused monitoring kit.
Includes Four Test Tubes, Caps, Computer-Analyzed Laminated Color Charts, Instructions
Q: Which aquarium water parameters does the API Freshwater Master Test Kit measure?
A: The API Freshwater Master Test Kit measures pH, high range pH, ammonia, nitrite and nitrate in freshwater aquariums.
Q: What is included with the API Freshwater Master Test Kit?
A: The API Freshwater Master Test Kit includes seven bottles of testing solutions, four capped test tubes, a holding tray and a laminated color card.
Free standard shipping on every order to U.S. addresses, with no minimum. Orders are prepared in 1–3 business days and arrive 3–7 business days after they ship. Alaska, Hawaii, Puerto Rico and remote addresses can take longer. You get a tracking number by email as soon as your order ships. See shipping details.
Free returns within 30 days. You can return an item within 30 days of delivery, no reason needed. We email a prepaid return label; items should be unused and in their original condition. Your refund goes back to your original payment method within 10 business days of us receiving the return. See returns & refunds.
Damaged or wrong item? Email a photo to othercenter.us@gmail.com and we will make it right.
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