Review on 🐠 Mardel 5-in-1 Test Strips for Freshwater and Saltwater Aquariums by Brittany Stewart

I've been trying to raise the pH in my aquarium with test strips for a while but the pH color has never changed. So I tested the water at the fish store. As a result, my pH had already increased and was now too high. Unusable test strips! Tests for nitrates and nitrites work. The other 2 buffers and hardness never changed so I don't know if they are stable in my tank or if they don't work either. I will not buy this product again.