Seachem MultiTest Copper – Sensitive Copper Test Kit for Marine & Freshwater

Dose Copper Safely Without Guessing the Level

Copper is a powerful treatment but a narrow line separates an effective dose from a toxic one, and invertebrates are especially unforgiving. Without a precise reading, you risk harming the very tank you're trying to protect.

MultiTest Copper measures all types of copper to less than 0.01 mg/L in marine or freshwater using a highly sensitive catalysis based procedure. It performs over 75 tests and includes a reference sample for validation, giving you the accuracy to manage copper down to a precision of 0.0025 mg/L.

MultiTest Copper is developed by Seachem Laboratories, the chemistry-driven company founded in 1979 in Madison, Georgia, USA, whose test kits are formulated in-house by its own chemists. That reagent-based engineering is what makes MultiTest kits so trusted for accuracy and sensitivity: the copper procedure uses catalysis to detect all types of copper at very low levels and ships with a reference sample, so you can validate the kit and dose with confidence.

1. Prepare your water sample per the kit.
2. Read the result to measure copper down to less than 0.01 mg/L.
3. Validate your reading against the included reference sample.

Take the guesswork out of copper dosing. Add to cart.

What It Does

This kit measures all types of copper to less than 0.01 mg/L in marine or freshwater. It uses a highly sensitive catalysis based procedure.

Details

MultiTest Copper performs over 75 tests and contains a reference sample for validation. Range: 0-0.80 mg/L. Precision: 0.025 mg/L & 0.0025 mg/L.

Why Seachem MultiTest Copper

• High sensitivity: a catalysis based procedure measures all types of copper down to less than 0.01 mg/L, with precision of 0.025 mg/L and 0.0025 mg/L across a 0-0.80 mg/L range.
• Measures all copper types: it reads every form of copper, so your result reflects the true level regardless of the treatment used.
• Great value per kit: performs over 75 tests, covering an entire copper treatment cycle and beyond.
• Built-in validation: includes a reference sample so you can confirm the kit is reading accurately before you dose.

Best For

Ideal for hobbyists running copper-based treatments in quarantine or hospital tanks, and for anyone who needs to verify copper has fully cleared before adding sensitive invertebrates. It works in both marine and freshwater systems.

FAQ

Freshwater or saltwater? It works in both marine and freshwater aquariums.

How many tests does it perform? The kit performs over 75 tests and includes a reference sample for validation.

How precise and what range? It measures all types of copper to less than 0.01 mg/L, with a range of 0-0.80 mg/L and precision of 0.025 mg/L and 0.0025 mg/L.