[Zbrafish] Re: problems with spawning

[DSA]

On Sep 24, 2:37 pm, "Dr. S" <sspine... from ric.edu> wrote:
> When we first set up our system over 2 years ago, we had a very
> sucessfull year and a half, no disease, lots of great large healthy
> collections. then suddenly things changed, fish got sick and stopped
> spawning. We tried isolation, water chages etc. finally we gutted
> everything and started fresh.
>
> A coupl of months ago we started up 2 new fresh 20 gal tanks
> (Biowheel). One for the males and one for the females. We had switched
> to "conditioned" MilliQ water containing bicarbonate, instant ocean
> and calcium sulphate such that our pH is between 7.2-7.4, our
> conductivity is 400-450microS, our ammonia is o nitrite is 0 nitrate
> is sometimes slighly measurable before we do the water change, temp is
> 27-28. we monitor these things every day. We do 10% water changes
> daily and clean the tank very well every month, replacing 50% of the
> water and the carbon filters. We feed the fish 2-3x per day artemia
> and dry food from Aquatic Ecosystems that they claim is the best
> formula. The fish look healthy although the males don't seem to eat as
> much as the females. The females bellies are large but they are not
> spawning at all. What else can we do? Please help.
>
> Thank You

I've been through this, it's really frustrating.  Once, it turned out
the light timers were not working, which I hadn't noticed because the
lights were always on during the day.  It turned out they were on all
night too.   Since you've listed everything else that it turned out to
be at one time or another, who knows.