Look, I get it—distilled water seems like the “pure” choice, and the internet loves to sell you stuff. But your fish aren’t lab experiments. They’re living creatures with specific needs, and water chemistry isn’t just a nerdy hobby—it’s life support. So save the distilled water for your car battery, your steam iron, or your Instagram-famous watering can. Your fish tank? Give it the real deal: treated tap water with all its messy, mineral-rich glory.
And hey—if you’re still confused, just ask your fish. I swear, Bruce Lee gives me the side-eye every time I walk near the faucet. He knows what’s up. Stick with the basics, test your water, and remember: fishkeeping is 90% patience and 10% not using distilled water. You’ve got this.