Freshwater Aquarium pH
Let’s talk about the freshwater aquarium. Although you have looked up the perfect pH for the type of fish you have: an even, consistently constant pH is more important. The correct pH for the species of fish you have is critical, but if you allow that pH to fluctuate, then it is actually more dangerous to your fish than having the pH be slightly off and yet keeping it constantly at that pH. This is because many times, your fish can adjust to a different pH; but cannot adjust to a continuously changing pH.
It’s all in the water. The water you use in your aquarium can buffer, or resist, changes. This is why you will want to begin with a hardness test on the water you use for your fish to swim in. If when you test the hardness of the water you will put into your aquarium, you get a reading of 4 - 6 dH, that will usually work for you to keep your pH at a constant level. Lower than this, and your pH will probably be buffered to a lower level and this will not be acceptable.
Your aquarium water usually will keep your pH level even and stable because of partial water changes that you do and also your routine aquarium maintenance, such as cleaning filter pads and vacuuming the substrate.
If you find that you need to raise the pH of your tap water because it is not naturally at the appropriate level, there are products you can buy to accomplish this. (See below for one possible suggestion.)
In the case that you may need to lower the pH of your local tap water, you can use a product called “pH Down”, but first you need to get a Tap Water Purifier to remove the buffering ions from your tap water. This will take out the salts and minerals from your tap water that buffer the water.
Your routine maintenance of your aquarium is the best way to keep your pH on an even keel and your fish healthy and happy as a clam!
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