Aquariums: Just found out these guys grow Huge… I have two in a 65L

I honestly don't know how I bought these, I usually research the hell out of a fish before I buy it, I keep them with khuli loaches in a 65L (15gal). But IDK what to do they are 6 inches but are very peaceful atm and I'm emotionally to attached to re-home them what do I do 😭