How to Perform a Water Change (Without Stressing Your Fish)

Keep Your Tank Clean and Stable

Clean water is the #1 way to prevent illness and stress in aquariums.

How Often?

20–30% once per week for established tanks

More often for fry or uncycled tanks

Steps:

1. Use a gravel vacuum to remove water and debris

2. Refill with dechlorinated, temperature-matched water

3. Clean filter media only in tank water (never tap water)

4. Wipe glass, trim dead plant leaves if needed

 

Important Tips:

Never do large 100% changes unless it's an emergency

Always match temperature to avoid shocking your fish

Use water conditioner like Seachem Prime if unsure