Do I have to clean large decorative rocks in my backyard creek to put in an aquarium?

the stream is relatively clean

Yes, can not and just cleaning, but must be boiled for about 1/2hr. to kill parasites and bad bacteria.

300 Gallon African Cichlids Aquarium (ROCK)

Sunterra 104506 Table Top Fountain Pump 30 GPH, Black $10.13 FOUNTAIN PUMP – This pump not meant for dirty water (pond) applications. Must put in Pre-Filter box (337106) when using in a pond….

Milk Chocolate Rocks 3 pound bag (48 ounces of candy coated chocolate pebbles) $25.99 These beautiful milk chocolate candy pebbles look like the real thing! They taste great. They make great favors and gifts for themed events, such as golf or garden. They also make great decorations for cakes, cookies, and cupcakes. They range in size from ~.25″ to ~1.5″ These are handmade, therefore no two are exactly alike! There will be lot to lot variations. These are also known as candy rocks,…

Magic Rocks: Shark $8.50 This simple and fun project has been around for decades and is still as amazing and entertaining as ever. Simply place colored stones into a solution and watch them grow into beautiful, colorful crystal formations within just ten minutes. Set includes rocks in multiple bright colors, growing solution, display tank and plastic shark figurine….

Petquarium Battery Operated Animated Pet Fish $12.37 Enjoy all the fun of a real aquarium without the mess! These animated little fish make great companions anywhere around your home or office. Watch them magically swim, bob and dive just like real fish. Best of all, there’s nothing to feed or clean! Cordless unit makes a great desktop pal for kids and adults. Set includes fish, bowl, color beads and rock base. Catch them today…. they really swim!…

Lava Rock With 3 Holes Large Red Aquarium Ornament – Large $25.29 The Red Lava Rock is carved natural rock w/ three large, swim-through holes. The product features realistic detail and intricate textures and each one is individually boxed with a colorful tag. The Lava Rock is ideal for all freshwater and saltwater aquariums as well as terrariums. The product is made of durable poly-resin material. Measurements are the following 10.5 X 5 X 10….