How many pieces and shapes do you get?

I would say we got maybe 8-10 pieces/20lb box. They are a good size though. It is really neat stuff!

Can it be used in a fresh water aquarium?

Calcium rocks like sea shells in fresh water will leach out calcium and slowly dissolve. Will make you water turn to hard water over time. I would get plastic version if you like the reef rock style.

Does this need to be rinsed and soaked in R/O water before putting in tank?

It should be rinsed, the purpose of buying this rock is to *not* soak it. The coatings on it are meant to soak into the water in the tank to accelerate the adoption of new water to mature it quicker. I have built 3 aquariums with it, and it goes well, but I have had to black them out twice to kill off algae blooms. Bare rock is better if you intend to control all aspects of the maturity. This is a good product imho.

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CaribSea LifeRock Shapes - 20 lbs - Natural Aragonite Rock for Aquascaping, Supports Coral Growth & Tank Stability for Marine & Reef Tanks

Product ID: 57353805

Details

Brand
Carib Sea
Specific Uses For Product
Indoor
Material
Plastic
Compatible Material
Rock Coralline
Item Form
Pellet

⏩Speeds up tank cycling time

🪨20 lbs natural aragonite rock

⚙️Porous structure for natural filtration

1888.51 DT

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Description

🪸 Elevate your reef game with LifeRock — where science meets stunning aquascapes!

P H STABLE SAFE - Maintains perfect water chemistry, ensuring a healthy, stress-free environment for your aquatic life.
RAPID CYCLE ACCELERATOR - Infused with ammonia-reducing agents to fast-track tank readiness—get your reef thriving sooner.
BIOLOGICAL BALANCE BOOSTER - Porous design enhances natural filtration, stabilizing your marine ecosystem effortlessly.
NATURAL ARAGONITE POWERHOUSE - Authentic textures create stunning, reef-ready aquascapes that impress every guest.
LIMITLESS AQUASCAPING FREEDOM - Build reefs, caves, and ledges with no adhesives—customize your underwater masterpiece with ease.

CaribSea LifeRock Shapes are 20 lbs of natural aragonite rock designed specifically for marine and reef tanks. Featuring a porous structure that supports biological filtration and infused with agents to reduce ammonia, LifeRock accelerates tank cycling and maintains stable pH levels. Its realistic textures and adhesive-free design enable endless custom aquascaping possibilities, making it an essential foundation for vibrant coral growth and tank stability.

Specifications

Asin	B0773W3LXV
Best Sellers Rank	#67 in Aquarium Décor Rocks
Date First Available	November 2, 2017
Department	Unisex-Adult
Item Model Number	00381
Manufacturer	CARIBSEA INC
Manufacturer Recommended Age	1 month and up
Product Dimensions	3.25 x 5.75 x 7.5 inches; 24.6 pounds

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1888.51 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Tunisia.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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