AQUARIUM OF MARINE LABORATORY, ABERDEEN 



27 



rubber fube connections 



refriqerafed 



brine 



or 



antifreeze 



QP 



-pumps — 



thernnostaticall^ 

 controlled 



.experimental. 

 . , tanks 

 witn sea water 



-qiass coolinq coils 



4D 



(k 



FiGUKE 6. — Unit for coling a number of portable experimental tanks to varying controlled 



temperatures. 



sure of the refrigerant. Check the rate of cir- 

 culation of sea water over the refrigerator coils. 

 Check heater functionally on temperature con- 

 trolled tanks. 



9. Clean up the aquarium and ancillary rooms 

 (pumprooms etc.) 



10. Remove any uneaten food material. Siph- 

 on off excreta and other debris from the tanks. 



11. Make up sea water to the appropriate 

 level in any isolated tanks. 



12. Obtain supply of food material as required. 



13. Make up daily diary. 



Weekly maintenance 



1. Take pH of the sea water and adjust if 

 necessary. 



2. Take salinity of the water, adjusting for 

 evaporation where necessary. 



3. Clean the glasses of the tanks. 



4. Change over to the duplicate aerator motor. 



5. Renew the sheets in the temperature-re- 

 corder units (two). Refill the pens with ink 

 and check the accuracy of the recorder tempera- 

 ture. Check all thermostat controls functionally. 



6. Check the level of the water in the reservoir 

 tanks. Arrange for topping up if necessary. 

 Ensure adequate reserves of sea water in tanks 

 and carboys. 



7. Change over to the alternate reservoir tank. 



8. Clean out the aquarium and ancillary 

 rooms. 



9. Check all probes, including the action of 

 the emergency probes, in both header tanks and 

 sump. 



10. Check functionally all circuit breakers, 

 overload and other switches. 



11. Check functionally all lighting and power 

 points. Clean as necessary. 



12. Clean and grease all sea-water pump 

 motors. Check for corrosion. Clean off rust 

 and repaint as necessary. 



13. Examine outflow inspection chamber as a 

 check on leakage and inspect pumprooms and 

 all tank rooms for sea-water leakages. 



Monthly maintenance 



1. Drain, clean out, and reestablish each tank 

 on a 6-month rotational basis. 



712-029 0—64- 



