Review on 🐠 Qguai 9 in 1 Aquarium Test Strips - Saltwater Freshwater Pond Pool Spa Water Testing Kit: pH, Nitrate, Nitrite, Carbonate, Chlorine, Alkalinity, Hardness - Fast, Accurate & Convenient - 50 Strips by Tina Peterson

Parameters never changed in a brand new bike aquarium. Bought a big brand from the store and exactly regretted wasting my time on it, it could have killed my fish. Luckily, my intuition told me something was wrong. My fish started to get nervous, even though all the indicators (ammonia, nitrites, nitrates, etc.) showed zero values for all parameters (ammonia, nitrites, nitrates, etc.), except for the pH, which was considered neutral. It wasn't neutral, it was slightly alkaline. Luckily, I realized something was wrong and did a 50% water change. I was able to buy driftwood and other items to naturally adjust the pH balance in my aquarium for my Auqa pets. Therefore, do not buy this period.