Correct me if im wrong but after reading Romers papper I got the gist that sex ratio had more to do with temperture then pH. Perhaps you should try a diffrent Temperture Yvan. Dave --- Yvan Alleau <yalleau@coas.oregonstate.edu> wrote: > Hi apisotholics ! > while i've spend my time back in my city in France > finding solutions to > decrease the pH of the water in my tank, i never was > confronted to the > opposite: rising it! > My tap water here is at pH5 (here at Corvallis, OR) > and so is my tank water > pH or lower. Now, due to problem with sex-ratio with > some fish fry i would > like to increase that pH from 5 to 6. > Do you have any suggestions? > I thaught at first that adding some calcareous > stones or shell or rift lake > salt would do the trick by increasing the hardness > of my water but than the > eggs would have problem to hatch. > what is a simple way? > thanks all for your input. > A bientot > > Yvan Alleau > 712 N.W Kings Blvd > Corvallis, OR 97330 > College of Oceanic and Atmospheric Sciences > Oregon State University > office (Burt 222) # 737-3649, to be used wisely! > > PLEASE NOTE NEW E-MAIL ADDRESS: > yalleau@coas.oregonstate.edu > > "When you're far from everything, you're getting > closer to the essential" > > > ------------------------------------------------------------------------- > This is the apistogramma mailing list, > apisto@listbox.com. > For instructions on how to subscribe or unsubscribe > or get help, > email apisto-request@listbox.com. __________________________________________________ Do You Yahoo!? Send FREE video emails in Yahoo! Mail! http://promo.yahoo.com/videomail/ ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com.