Tetra Test 6in1: Instructions for Use

How to Test

Remove one strip and reseal the packaging. Dip the test strip into the aquarium water and move it 2 to 3 times. Shake off excess liquid. Wait approximately 60 seconds and compare the test fields to the scale on the packaging. Attention: Do not touch the test fields or hold them under running water!

Understanding Water Parameters

Nitrite (NO₂⁻) / Nitrate (NO₃⁻)

As part of the nitrogen cycle, organic material containing nitrogen (fish waste, uneaten food, dissolved waste) breaks down, producing nitrite (NO₂⁻) and eventually nitrate (NO₃⁻). High nitrite levels (> 1 mg/l) are harmful and can lead to fish loss. High nitrate levels (> 50 mg/l) are harmful to sensitive fish and promote algae growth.

• If nitrite or nitrate concentrations are too high, perform a partial water change (1/2 or 1/3). Always treat new water with Tetra AquaSafe before adding it to the aquarium.
• Use Tetra SafeStart to reduce high nitrite levels.
• Use Tetra NitrateMinus or Tetra BalanceBalls ProLine for long-term nitrate level management.

pH

The pH value indicates the water's acidity or alkalinity. A pH between 6.5 and 8.5 is tolerated by most freshwater fish, but ideal ranges vary by species.

• Use Tetra pH/KH Minus if pH and KH levels are too high, and Tetra pH/KH Plus if they are too low.
• Tetra EasyBalance stabilizes KH and pH levels long-term.

General Hardness (GH)

Favorable GH values are between 4 °dH and 16 °dH. GH represents the concentration of calcium and magnesium salts in the water.

• If GH levels are significantly high, add soft water (e.g., distilled or osmosis water) to your aquarium.
• If GH levels are too low, perform a partial water change with tap water that has a higher GH value. Always treat water with Tetra AquaSafe before or after adding new water.

Carbonate Hardness (KH)

Favorable KH values are between 3 °dH and 10 °dH. KH represents the hydrogen carbonate concentration, which acts as a pH buffer.

• If the KH level is too low, add Tetra pH/KH Plus to your aquarium. This increases hydrogen carbonate concentration and buffers pH long-term.
• If the KH level is significantly high, use Tetra pH/KH Minus to gradually adjust the desired carbonate hardness.

Chlorine (Cl₂)

Chlorine may be present in tap water and is harmful to fish and bacteria. It must not be introduced to the aquarium.

• Always prepare tap water with Tetra AquaSafe to remove chlorine completely.

Tip

Use the Tetra Aquatics App to quickly, safely, and easily determine water values using your smartphone. For more information on water quality, visit www.tetra.net.