Liquid organic calcium source. Accelerates coral growth. Reef Calcium is a concentrated product (50,000mg/L) designed to maintain calcium levels in reef aquariums without affecting pH. It contains no nitrogen or phosphorus, and therefore does not cause algae growth. Additionally, it contains organic calcium instead of ionic calcium, so coral expends much less energy to assimilate it. Reef Calcium is intended to maintain calcium levels and coral health. To speed up growth, it is best used alongside an ionic calcium supplement. 500 ml treats 8000 l.
Liquid organic calcium source. Accelerates coral growth. Reef Calcium is a concentrated product (50,000mg/L) designed to maintain calcium levels in reef aquariums without affecting pH. It contains no nitrogen or phosphorus, and therefore does not cause algae growth. Additionally, it contains organic calcium instead of ionic calcium, so coral expends much less energy to assimilate it. Reef Calcium is intended to maintain calcium levels and coral health. To speed up growth, it is best used alongside an ionic calcium supplement. 500 ml treats 8000 l.
Seachem Reef Calcium 2L
Liquid organic calcium source. Accelerates coral growth. Reef Calcium is a concentrated product (50,000mg/L) designed to maintain calcium levels in reef aquariums without affecting pH. It contains no nitrogen or phosphorus, and therefore does not cause algae growth. Additionally, it contains organic calcium instead of ionic calcium, so coral expends much less energy to assimilate it. Reef Calcium is intended to maintain calcium levels and coral health. To speed up growth, it is best used alongside an ionic calcium supplement. 500 ml treats 8000 l.
Liquid organic calcium source. Accelerates coral growth. Reef Calcium is a concentrated product (50,000mg/L) designed to maintain calcium levels in reef aquariums without affecting pH. It contains no nitrogen or phosphorus, and therefore does not cause algae growth. Additionally, it contains organic calcium instead of ionic calcium, so coral expends much less energy to assimilate it. Reef Calcium is intended to maintain calcium levels and coral health. To speed up growth, it is best used alongside an ionic calcium supplement. 500 ml treats 8000 l.
in 8 offers
The lowest price for Seachem Reef Calcium 2L right now is $64.00 at aquateesfishland.com.au, compared across 8 retailers.
The all-time low was $54.95 on 21 Oct 2025 — today's price is 16% above the lowest ever. That's a little above the best price we've seen.
Prices last updated 8 May 2026.
Last updated at 08/05/2026 10:17:31
Seachem Reef Calcium (SC358)
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Seachem Reef Calcium 2L
Reef Calcium, 2 L / 67.6 fl. oz.
Delivery between Sat – Mon $13.81
Reef Calcium, 2 L / 67.6 fl. oz.
Delivery between 15–17 May $13.89
Reef Calcium, 2 L / 67.6 fl. oz.
Delivery between 12–16 May $13.03
Seachem Reef Advantage Calcium 2lt
Seachem Reef Calcium 2L - Aquaristic Online
Delivery $14
Reef Calcium, 2 L / 67.6 fl. oz.
Delivery between 12–16 May $7.02
originally posted on ebay.com
Good item definitely 5* plants and snails enjoy it
originally posted on ebay.com
I use this and reef plus in a Red Sea max, and keep my salinity at 1.021.. two capfuls every other day..
originally posted on thetechden.com.au
Haven’t needed to use it yet but the service from tech den is great
Seachem Reef Calcium (SC358)
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Seachem Reef Calcium 2L
Reef Calcium, 2 L / 67.6 fl. oz.
Delivery between Sat – Mon $13.81
Reef Calcium, 2 L / 67.6 fl. oz.
Delivery between 15–17 May $13.89
Reef Calcium, 2 L / 67.6 fl. oz.
Delivery between 12–16 May $13.03
Good item definitely 5* plants and snails enjoy it
I use this and reef plus in a Red Sea max, and keep my salinity at 1.021.. two capfuls every other day..
Haven’t needed to use it yet but the service from tech den is great
Always used this for my corals
Excellent product does the job
Great price and arrived quickly
Haven’t needed to use it yet but the service from tech den is great
