Marine Calcium Supplement 4 fl oz – Calcium for Corals & Invertebrates

Price: €9.45
(as of Nov 12, 2026 05:32:10 UTC – Details)


ARKA Calcium is a calcium additive with pH stabilizer for all seawater aquariums. It prevents calcium deficiency, improves absorption thanks to vitamin D3 and optimizes the healthy growth of corals and invertebrates. The formula contains more than 100,000 mg/L of calcium in a highly bioavailable form. Dosage: 10 ml per 100 liters of water increases the calcium content by 1.0 mg/L, the optimal calcium content is 380 – 450 mg/L. In heavily populated seawater aquariums, the dosage can be daily. Shake well before use. Regularly check the water parameters. Contains anhydrous calcium chloride. H319: Causes severe eye irritation. Only for aquarium use. Keep out of reach of children. Do not drink.
Calcium supplement for corals – ARKA Calcium prevents calcium deficiency and optimizes the healthy growth of corals and invertebrates in seawater aquariums, especially in measurable consumption reefs.
Over 100,000 mg/L of calcium – The formula contains highly bioavailable calcium, with vitamin D3 for better absorption. Calcium rises in a targeted manner, also in SPS and LPS tanks.
Robust limestone skeleton – Calcium is a central element for robust limestone skeletons, stable development and feeding of corals and invertebrates, especially high consumption seawater.
4 fl oz for nano-reefs – The compact bottle is suitable for small aquariums, beginners and targeted supplements. 1 ml per 100 litres increases calcium by 1.0 mg/L, target value 380 – 450 mg/L.
Tips & Notes – Skimmers, ozonizers, charcoal and zeolite filters can reduce important trace elements. Regularly check the water. H319 Causes severe eye irritation. Do not drink.

Product summary

shift
+
ALT
+
D