CaribSea South Seas Base Rock, 18.1KG

CaribSea South Seas Base Rock is a premium dry rock choice for building stable, natural-looking aquascapes in reef, marine, or even freshwater aquariums. Mined from ancient, fossilized coral beds, this aragonite-based rock is highly porous, making it an excellent foundation for beneficial bacteria colonization—essential for biological filtration and long-term tank stability.

Shipping

Please note: If the size and weight of your order exceeds the standard box shipping size extra courier fees will be communicated to you after you have placed your order. Due to the complexity of this it can not be calculated during checkout. The website will only calculate the minimum shipping Charge. This is company Policy.

We only ship livestock and plants Monday – Wednesday. All other products can be shipped Monday – Friday. To ensure livestock does not sit in the couriers warehouse over the weekend.

Returns

Non-livestock items are returnable within 7 days upon purchasing. If the item is found to be in working condition, the client will be liable to cover ALL shipping fees. If items is faulty, a full refund or replacement will take place and shipping will be covered by Aqua Atlantis.

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Product details

CaribSea South Seas Base Rock
Natural Aragonite Dry Rock for Marine & Freshwater Aquariums

With its intricate shapes, ledges, and holes, South Seas Base Rock allows for flexible aquascaping and provides ideal shelter and swim-throughs for fish and inverts. It can be used on its own or mixed with live rock to speed up tank cycling and boost biodiversity.

Key Features:

100% natural aragonite rock — no artificial additives or dyes
Highly porous for maximum biological filtration support
Great for reef tanks, saltwater fish-only setups, or cichlid tanks
pH-buffering properties help stabilize water chemistry
Can be cemented or epoxied into custom structures
Safe and pest-free — starts dry to eliminate hitchhikers and unwanted algae

Pro Tip: Seed dry rock with live rock or bottled bacteria to jumpstart your tank’s nitrogen cycle and establish a healthy biological base faster.

Whether you’re building a minimalist aquascape or a complex reef structure, CaribSea South Seas Base Rock offers beauty, function, and long-term reliability for any aquarist.