IV CONTENTS 



Marine Aquarium Procedures and Techniques — Continued 



Description — Continued Page 



Breeding tanks 57 



Connections between tanks — the siphons 59 



Utilization of the "tides" 63 



The substratum 64 



Filtering system 66 



Modification of the sand milieu for a public tank 66 



Cultivation of algae 67 



Conclusion 68 



A Fast-Flow Closed-Circuit Marine Aquarium, by L. J. Hale 69 



Ecological considerations 69 



Inorganic ions 69 



Suspended particles 70 



Water movement 70 



Temperature 70 



Design of aquarium 70 



The pump 71 



The tanks 73 



Tank connecting units 73 



Tidal conditions 74 



Filtration 74 



Lighting 74 



Acknowledgments 74 



Literature cited 75 



A Subsidiary Hot- Water Circuit in an Aquarium Fed by an Open Circuit, 



by L. Barriety 77 



Experimental Sea-water Systems for Rearing Fish Larvae, by J. E. Shel- 



bourne 81 



Closed circulations at Lowestoft 82 



The 50-gallon system 82 



The 3,500-gallon system 84 



Bacterial control in closed circulation 86 



Open circulation at Port Erin, Isle of Man 88 



Local filtration and temperature control 88 



A variable salinity apparatus in open circulation 89 



Summary 92 



Literature cited 92 



A Working Bibliography on Rearing Larval Marine Fishes in the Lab- 

 oratory, by James W. Atz 95 



Marine teleost fishes reared in captivity 97 



Bibliography 99 



EsTUARiNE Water Systems at Solomons, Maryland, by David G. Cargo 103 



The wharf system 104 



The main system 105 



Evaluation and remarks HO 



Summary 112 



References 112 



Sea- Water Supply in the Tropics, by Warren Wisby 113 



Existing system : 113 



Salt-water system for new building 115 



Temperature 116 



SaUnitv 116 



pH 116 



Dissolved oxygen 116 



Dissolved carbon dioxide 117 



Turbidity control H'^ 



System for maintaining programmed variations of any controllable 



parameter H' 



Summary 117 



Addendum 118 



