His tail - looks like fin rot to me. You can treat this like this:
Quote:
Tail rot or fin rot
•Symptoms: Betta’s fins and/or tail seem to be getting shorter and shorter or they seem to be falling apart and dissolving, Black or red along the edge of the betta’s fins/tail, Bloody tips, Behavior may not change
Treatment: Conservative: Treat with Aq.Salt at 1 tsp/gal. Increase water changes to 100% daily. Replace accurate amount of salt following water changes. Add Stress Coat to help repair tissue. If there is little to no improvement within the first 5 days, you can increase the salt dosage gradually to 2tsp/gal but do not continue any salt treatments past 10 days. Medication: If Conservative treatment is ineffective use API Tetracycline, API Fungus Cure, API Triple Sulfa, OR API Erythromycin. Also add Stress Coat to help regrowth. Continue until fins/tail stop receding and start showing some new growth.
And the head.... is that white fuzzy/furry/cottony patches on his head? (It's a bit blurry)
But you can read about Betta fish disease and treatments here:
i change his water all the time.....literally, plus it is filtered i use kordon water conditioner each time. i did a 100% change last night..... changed filter but didnt rinse gravels or anything to keep some good bacteria
That is understandable, but without the information we really have no idea what is happening in the tank or what could be causing it etc so we need to know,
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