Things You'll Need
- Bucket
- Bleach
- Measuring cup
- Hose
Instructions
Mix water and bleach in a bucket at a ratio of 19 parts water to 1 part bleach. You'll need enough solution to completely cover the gravel.
After removing the fish from your tank, drain out the water. Carefully pour the gravel into the bucket with bleach solution. Try to avoid splashing the bleach solution. Let the gravel soak for at least 30 minutes in the solution.
Drain off the bleach solution and thoroughly rinse the gravel with tap water three or four times.
Place the gravel back into your fish tank and refill with water according to your usual tank-filling procedure.