Re: [Killietalk] cool water versus oxygenated water

["Harry Specht" <aus62 at comcast_net>]

Right on, Gary. One of my friends, Henri DeBruyn developed a cheap (easily 
built) filter of the Wet/Dry variety. The water was bubbled up and over lava 
rock. Upon falling back, through holes in the bottom of the tray, it fell as 
a waterfall. Henri measured oxygen levels almost 30 per cent higher than in 
a still tank and slightly cooler. He felt, as you suggested the oxygen level 
was the most important feature and cooler water retains more oxygen. I might 
mention, Henri raised almost every type of Aphyosemion available, even when 
he lived in Florida  about five years. His homemade filter is a real boon to 
"cool water' killifish breeders. By the way, it is described in JAKA

Henri stumbled onto this fact some years ago in Belgium A very hot summer 
season occurred -- unusually hot with temps in the 90"s and most homes do 
not have much A/C as this is so unusual. Most of  his killifish breeder 
friends lost their killifish whereas Henri was using his modified Wet/Dry 
filters and lost very few fish. Further experimentation on his tanks 
revealed the higher oxygen levels in his tanks with the special filters. 
Yep, Henri is a true scientist and observes things  very closely.

Good luck with cooler water.

                                                                             
        Harry Specht
                                                                             
        Sarasota, FL 


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