faq | contact nippyfish.net
a site for the modern betta enthusiast




Acclimation Set Up


Get your new tank ready and have water conditioners, a thermometer and testing supplies on hand.

Testing Supplies


The most important water parameters to coordinate when acclimating your new betta are temperature and pH.

Float the fish in a bag or plastic cup


The amount of time needed to acclimate your new fish may vary from 15 minutes to an hour or more.

Female Betta Swimming in New Tank


The following weeks after acclimation are the most critical. Watch your new fish closely for signs of stress or disease.

Acclimating Your New Betta


Why Do We Acclimate Our Aquarium Fish?

Fish are hypersensitive to their surroundings and need to be gently introduced to their new home. If you bring your fish home and plop him directly into this new tank without acclimating him properly, he may experience any number of stressors causing severe trauma or even shock-induced death. It’s vital to check the basic parameters including temperature and pH before adding fish to their new aquarium.


Where to Begin the Acclimation Process


There are a few different situations you may find yourself in. You might have set up an aquarium weeks ago and cycled it to prepare for your new fish. You may have a community tank already and have decided to quarantine your new fish for the suggested 4 week period before adding him to the group or you may have decided to do full 100% water changes and are setting up your aquarium just before the acclimation process. If you’re setting up a new aquarium, it’s suggested that you do it 24 hours prior to acclimating your new fish to allow for off-gassing.

The first step in the acclimation process is to test the water parameters in your fish’s bag or cup. Check and record the temperature and pH. You may also want to check for ammonia, nitrite, nitrate, gH and kh so you know what you’re starting with. After all, once you toss that old water, you’ll never get that information back. Temperature and pH, however, are the most critical. Then test and record the temperature of the new tank. If the temperature is very different from the bag water (more then 4 degrees Fahrenheit), then I suggest adjusting the heater accordingly or adding cooler or warmer water to get it within a few degrees. This will help reduce stress to the fish as he gets used to the new temperature. If you’ve just set up the new aquarium, don’t forget to treat the water with aquarium water conditioners that will effectively neutralize chlorine, chloramines and heavy metals. Once the water temperature is fairly close, go ahead and test the pH.


Adjusting pH


Bettas prefer soft water with a pH between 6.0 – 7.0; however, they can adjust to a range of pH levels so long as they are consistent and not rising or falling quickly. If you find that your tank’s pH is different from the bag water, I suggest you take more time acclimating the fish rather then altering the pH with chemicals like pH UP or pH DOWN. Those chemicals tend to make quick drastic changes in the pH only to have them quickly and drastically revert back to where they were. Remember, those rapid fluctuations are more dangerous then a stable pH outside of the ideal range.

Floating the Bag or Cup


Once you have your parameters checked and your water conditioned you are ready to float the bag or cup. If the bag / tank water parameters were already very close then usually 15 – 20 minutes will be sufficient. If the parameters differed, then longer may be necessary. If the pH or other parameters were off then I suggest adding a 1/4+/- cup of new tank water to the bag every 15 minutes for up to an hour or more. This may help the fish to avoid any shock from pH, ammonia, or other parameters. Once the time is up you can slowly release the fish trying to avoid adding dirty bag water to the tank. 

Acclimating is Stressful


Remember, the acclimation process can be pretty stressful for even the hardiest of fish. Even stretching the process to an hour or two doesn’t really give the fish enough time to adjust properly. Be vigilant of your new fish and keep an eye out for signs of stress or disease, especially in the first two weeks after acclimation. 

This is just one method for fish acclimation. If you have another, feel free to write in and we’ll share it with our readers.


Member of  AquaBanners.com


2006© Nippyfish.net | Webmaster Christie M Fournier
Last Update | July 2006