Aquaforest AF Rock 18 kg — Porous Pest-Free Reef Rock 40 lb Box

Aquaforest AF Rock 18 kg — porous reef aquarium rock parasite-free 40 lb

The AF Rock 18 kg is the large-aquascape format of Aquaforest's synthetic reef rock. 18 kg (~40 lb) bag of rock hand-crafted from natural ingredients, sized to compose a full aquascape on a mid-to-large reef tank — 400-800 L. Very porous high-density rock delivering maximum biological exchange surface, no parasite, algae, or pest risk.

Modern alternative to wild-collected live rock with heavy ecological impact — AF Rock is artificially made from compounds similar to live rock, without ever touching natural reefs.

What AF Rock 18 kg brings to aquascape

• High-density porosity — fast and durable bacterial colonization.
• Parasite and nuisance algae-free — 100 % safe aquascape.
• Lightweight — easier to handle than classic ceramic rocks.
• Calcium carbonate — natural pH and KH stabilization long term.
• Mixed shapes — piece variety supports all aquascape styles.

Large-format use

• Rinse with prepared saltwater before installing.
• Compose the aquascape out of tank for better precision and to avoid livestock stress.
• Combine with Bio Sable and Bio S for fast biological startup.
• 3-4 weeks minimum biological cycle before adding sensitive livestock.

Specifications

• Brand: Aquaforest (Poland)
• Format: 18 kg bag (~40 lb)
• Type: large-format synthetic reef rock
• Compatibility: 400-800 L reef tanks, full large-volume aquascape

Why choose Aquaforest at ReefSolution

• AF Nano Rock 3.5 kg — the nano format to fill in small spots.
• AF Rock 1 lb — the per-pound format for one-off adjustments.

Frequently asked questions

How much AF Rock for a 500 L tank?

At the 1-1.5 lb per gallon rule (~132 US-gal for 500 L), that's 132-198 lb or 60-90 kg. An 18 kg bag covers about 20-30 % of a full 500 L aquascape; plan 3-5 bags for a complete composition, or combine with used live rock to top up.

Does the rock gain weight once wet?

Marginally — high porosity absorbs water (5-10 % of dry weight) but stays much lighter than a dense ceramic rock. That relative lightness helps with overhang aquascape and reduces load on sand and tank floor.

Does AF Rock 18 kg suit a high-quality SPS tank?

Yes — porosity and calcium carbonate make it a technically excellent rock for SPS. The only visual point to consider: AF Rock is synthetic and looks "cleaner" than wild-collected live rock. Some aquarists prefer this modern aesthetic, others prefer the biological patina of mature live rock.