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It's common for bettas to change colors once they are in good conditions.

To be honest, he looks relatively fine to me.

Try clean water for now and watch him closely. he could either be ripping his tail on decorations or be nibbling on it. It doesn't look like he has fin rot going on though.

What size tank is he in and what's the temperature?
 

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Discussion Starter · #8 ·
really?? the little black edgings look scary - like little bacteria are nibbling at his poor fins. and that one split keeps getting deeper! he's in a 1 gallon (yes, i know, too small - but i'm having to make do). 100% water changes everyday, API stress coat, 1 small silk plant, small heater keeps it around 77ish.
 

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Discussion Starter · #11 ·
ohh. i will try that then. some sites i read said that for a 1 gal you need to change 100% everyday... so thats why i did that. i didn't know it could stress them out more!

i guess i was just wondering if tetracycline was ineffective for my water - maybe too hard or something? wondering if there was other meds i could try.
 
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