API Reef Master Test Kit – Calcium, KH, Phosphate & Nitrate

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The API Reef Master Test Kit is a must-have testing solution for reef and marine aquariums, letting hobbyists accurately monitor the key water parameters critical to coral growth, coloration, and reef stability. It helps reef keepers maintain proper water chemistry and catch problems before they impact sensitive corals and invertebrates. Ideal for SPS, LPS, and mixed reef systems, the kit delivers reliable, easy-to-read results using trusted API liquid test technology. Key Features Designed for reef and marine aquariums, monitoring coral-critical parameters Accurate, reliable liquid tests with laboratory-grade reagents Easy-to-read color charts Supports coral growth, color, and health Ideal for SPS, LPS, and mixed reef systems Tests Included The API Reef Master Test Kit measures four key reef parameters: Calcium (Ca) – essential for coral skeletal growth Carbonate Hardness (KH / Alkalinity) – stabilizes pH Phosphate (PO₄³⁻) – helps control algae and coral stress Nitrate (NO₃⁻) – maintains safe nutrient levels Regular testing ensures optimal reef conditions and long-term success. Product Details Brand: API Product: Reef Master Test Kit Aquarium Type: Saltwater / Reef Test Type: Liquid reagent tests Skill Level: Beginner to advanced reef keepers Why Reef Testing Matters Maintains stable alkalinity and calcium levels Prevents nutrient imbalances and algae outbreaks Supports coral coloration and growth Essential during tank cycling, fragging, and water changes Frequently Asked Questions Q: Is this kit suitable for SPS-dominant tanks?A: Yes, it's ideal for SPS, LPS, and mixed reef aquariums. Q: Does this kit test pH or ammonia?A: No, those are available in separate API test kits. Q: How often should reef parameters be tested?A: Weekly for established reefs, and more often for new or heavily stocked systems. Q: Are the tests easy to use?A: Yes, clear instructions and color charts make testing straightforward. Q: How many tests does the kit include?A: Enough reagents for dozens of tests, depending on usage. Show more