How to clean hard water stains in a fish tank without harming fish?

Question

My 55 gallon fish tank has hard water how do i clean it out that won't harm fish?

Angel Alvarado, LVT · Accepted Answer

If you are getting hard water deposits, use a utility razor and gently scrape the deposit off the glass. When you're doing a water change, if the water level drops below the deposits, use a cloth dampened with plain vinegar and scrub. Be careful to not allow any vinegar into the water. Wipe it well with a clean cloth to remove any vinegar residue and refill. Ideally, the tank should be emptied, sprayed with vinegar, sit for 10-20 minutes then scrubbed or scraped.

How to clean hard water stains in a fish tank without harming fish?

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