Pro Shrimp

HK Dry Ocean Reef Rock ** 13-20cm ** MEDIUM (per kg)

HK Dry Ocean Reef Rock ** 13-20cm ** MEDIUM (per kg) - Main image
$2.99 $3.99 In stock

Category: Aquarium Rocks

Dry Ocean Reef Rock 13-20cm

These rocks are not inert and will release minerals into the water. They are not suitable for soft water shrimp setups and should only be used in tanks with hard water shrimp (Cherry, Amano etc.) or marine tanks. Regular water changes as part of maintenance, advisable. These are sometimes used in certain sulawesi shrimp setups.


Weight and size always varies by type of rock. We will try to mix and match your chosen weight as closely as possible, but this can't always be guaranteed! If you have a preference in number of rocks or size, please leave a note during checkout and we will try to accommodate where possible. Since this is a natural product individual rocks will vary. You are welcome to pick out your own pieces by visiting our shop in Mansfield.


Always rinse and clean rocks before adding them!

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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (5.0 / 5 · 4 reviews)

Matthew L. ★★★★★

I was worried these rocks might leach too much, but they've actually stabilized my water chemistry nicely for my hardwater cichlids. The 13-20cm chunks stack really well to create solid caves and ledges.

Stella S. ★★★★★

The 13-20cm size is perfect for building a natural slope without needing tons of pieces, and the rock texture gives my hard water cichlids plenty of hiding spots. It does leach minerals as stated, so I’m glad I tested my water first—my shrimp tank would’ve been a disaster.

Avery C. ★★★★★

These rocks have been in my hard water African cichlid tank for two weeks and my pH is holding steady. The 13-20cm size is perfect for building a nice structured scape without being too heavy.