CONTENTS 



Page 



Sea-Water Systems for Experimental Aquariums, by John R. Clark and 



Roberta L. Clark 1 



Some Principles and Practices of Water Management for Marine 



Aquariums, by James W. Atz 3 



Materials suitable for sea-water systems 4 



Natural constituents of sea water 5 



Changes occurring in sea water removed from the sea 5 



Changes occurring in sea water after long use 7 



Dissolved respiratory gases 9 



Marine circulatory systems 9 



Addendum 13 



Literature cited 13 



A New Formula for Artificial Sea Water, by Richard Segedi and WOliam E. 



Kelley 17 



The Backhaus formula 17 



Literature cited 19 



Notes From the Aquarium of the Marine Laboratory, Aberdeen, by H. J. 



Thomas 21 



Structural data 21 



Operating data 22 



Temperature control 24 



Special features 24 



Isolated tanks 25 



General 25 



Details of aquarium maintenance 26 



Daily maintenance 26 



Weekly maintenance 27 



Monthly maintenance 27 



Quarterly maintenance 28 



A Closed Circulating Sea-Water System, by M. S. Gordon and R. A. 



Boolootian 29 



Structure of the system 29 



Recommendations 32 



Acknowledgments 34 



Addendum 34 



A Medium-Sized Sea- Water System for the Laboratory, by J. E. Mclnerney 



and W. S. Hoar 35 



Contamination 35 



Oxygen 35 



Waste material 35 



Temperature 36 



Miniature Circulating Systems for Small Laboratory Aquariums, by 



C. M. Breder, Jr 39 



Open systems 39 



Closed systems 44 



Materials 50 



Treatment of water 50 



Addendum 52 



Control of inflow 52 



Constant-level siphon 52 



Literature cited 53 



Marine Aquarium Procedures and Techniques, by Yves B. Plessis 55 



Description 55 



Reserve tank 55 



Water circulation system 56 



Exhausting devices 56 



III 



