Gouramis turning black?? Help!

Jan 3, 2017
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#1
I recently bought two gouramis and were told they are Thick-Lipped Sunset Gouramis. When I got them, they were all orange. Now they seem to be turning black? Can anyone tell me if that's normal? Or should I do something? Thanks!!
 

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FreshyFresh

Superstar Fish
Jan 11, 2013
1,337
23
38
East Aurora, NY
#2
Welcome. I can't say for sure what type these are, but they look like dwarf flame gouramis to me. Do you have readings in PPM for ammonia, nitrite and nitrate? If not, big water changes need to be done often.