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Hobby Fish retail aquatic store between Milton Keynes, Northampton & Buckingham

Online orders are despatched from multiple sites. Online stocks do not reflect stocks held at our Milton Keynes store. Please call
01908 543210
to confirm instore stocks before travelling.

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Saltwater supplement.
  • Indispensable for the care of corals and calciferous red algae
  • 50 ml increase the magnesium content in 50 l by 50 mg/l
  • JBL MagnesiuMarin supplements inadequate levels of magnesium in the reef aquarium
  • Recommended contents: approx. 1200 mg/l*
  • Contents can be monitored with the JBL Test Set Mg/Ca
The popular calciferous red algae and invertebrates which develop a calcarous skeleton or a hard shell in reef aquariums need sufficient magnesium to build up their shells or skeletons. These animals include rock corals, soft corals, sponges, sea urchins, crustaceans, bivalves, gastropods, etc.

*as measured in the Indo-Pacific

RRP: £ 20.95
Our Price:  £ 17.81
Delivery: 7-14 days
MagnesiuMarin 500ml