Aquarium Nitrate & Nitrite Test Strips

Monitor aquarium and aquaculture water quality with Indigo^® Nitrite-Nitrate test strips. These simple tools can detect toxic nitrite and nitrate buildup to protect fish health and biofiltration balance.

Nitrite and nitrate are critical indicators of biological filtration performance and nitrogen cycle stability in aquariums and aquaculture systems. Indigo® Nitrite–Nitrate Test Strips provide a fast, dependable way to detect toxic nitrite accumulation and rising nitrate levels before they harm fish, invertebrates, or biofilters. The simple dip-and-read format allows routine monitoring of freshwater and marine systems without liquid reagents or complex test kits, supporting stable, well-managed aquatic environments.