An improved system for the control of dissolved ...



Title An improved system for the control of dissolved oxygen in freshwater aquaria
Author(s) M. J. Landman, Michael R. van den Heuvel
Journal Water Research
Date 2003
Volume 37
Issue 18
Start page 4337
End page 4342
Abstract A system for the removal and control of dissolved oxygen (DO) from freshwater was designed and constructed with aquarium-type fish studies in mind. Degassed water was obtained using a partial vacuum of -14 psi, and DO regulated at an aquarium scale using electronically controlled aeration with timed partial water renewal. The degassing system was capable of producing water with approximately 1.7 mg L(-1) DO within 10 min of operation, and 0.55 mg L(-1) after 2h. The control system was capable of maintaining DO levels of ca 0.8 mg L(-1) over 48 h in the absence of aeration and further capable of precisely controlling DO levels as low as 1.16+/-0.002 mg L(-1) (mean+/-SEM) with aeration over a 48 h period.
DOI 10.1016/S0043-1354(03)00417-2

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