Hi this is Dr. Jen :-) I am sorry that your fish is sick. I am quite worried about him. I need to get some more info in order to help you.
How big is your tank? Is it cycled or in cycled?
Can you tell me what your levels of ammonia, nitrite, and nitrate are?
Most often illness and fish stems from water quality issues. Typically laying on their site indicates a swim bladder issue which again is often secondary to environmental conditions.
How often do you do water changes and what percent of the water do you change? Can you give me some more information about ammonia, nitrates, and nitrites?
You need to get something called an API master test kit to test your water parameters at least a few times a week. I currently have my betta in a 3 gallon bowl because my cycle in my actual tank crashed and I have to change his water every single day because the ammonia gets too high in 24 hours. Go ahead and do a 100% water change and save a bit of the old water so that you can test.
API Water Test Kit https://www.amazon.com/dp/B000255NCI/ref=cm_sw_r_cp_api_glt_fabc_FCQNMVB46RNMA33FTDVT?_encoding=UTF8&psc=1
The cycle is where you get beneficial bacteria built up in your tank creating nitrates that will keep the ammonia levels low. Let me see if I can find you an article.
Also the minimum recommended size for a tank for a betta is 2 1/2 gallons. Mine are in 8 gallon tanks.
They should be kept separate. Exception to this is females can be kept in what is called a sorority but you must ha
The conditioner and tank is good. I am not a fan of test strips as they are in accurate. I would suggest the testing kit that I sent you a link to before instead. To be honest with you I would start off with artificial plants at first until you get everything else figured out. Do you happen to be a member of Facebook? There is a very good informative group called beta fish health and happiness that I would recommend joining if so.
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