It is recommended not to use pool water test strips in your aquarium. Pool test strips are primarily designed to measure the swimming pool’s pH level, not your fish tank’s. 
While it’s possible to use the best pool test kits for your aquariums, it’s not the best option. Guess why" Because these swimming strips don’t provide accurate test results for ph, ammonia, nitrite, and nitrate levels. 
For this reason, it’s appropriate to stick with test strips specifically designed to check the water quality of freshwater tanks. Read our guide to choose a pool store test kit that is good for your aquarium. 
Why Use Aquarium Test Kits"

Testing aquarium water is one of the most important things you can do to ensure the health of your fish. But why is it essential to sample the water in the first place" Testing the hardness of your tank?s water can help identify potential problems before they become serious.  For example, if the ammonia levels in your tank or tap water are high, this could be toxic to your fish and cause them to fall ill. The water tank test paper will significantly help you evaluate different water parameters, including pH, ammonia, and nitrate. 
And here are a few tips to consider before you start using water test kits in a tank. 

Make sure you’re using a reputable brand 
Test water quality regularly 
Every test kit is different, so follow the instructions carefully 
You should only use a fish tank...