[Zbrafish] Re: multi-tank system - problems with fish survival

[eas from stowers-institute.org]

It seems that there is a lot of missing information here. Joe asked
many of the questions that you need to answer for this community to
give you the advice you are after. But also, what is your conductivity?
salinity? water temperature? Are you performing adequate water changes
(10%/day)? Are you documenting water quality etc. so that you can see a
trend when it occurs? Is your photoperiod correct (14/10)? Are you
certain your light are on/off correctly? Are you changing your carbon
enough? If the ammonia/nitrate/nitrite levels get way too out of hand,
a product like Amquel+ or Prime is a good way to remove some of it
(removing all of it would detract from the maturation of the
biofilter). Also, you can use products to 'fertilize' your biofilter as
well which will help it get established.

Is this an AHAB system or something else?

The materials used in these systems have been in use all over the world
for some time now, and are not likely to be the issue here. Once your
biofilter has completed its cycle, the water quality has stabilized
and, provided you are not crowding the embryos (30-50 per dish), you
should see an increase in breeding success, and clutch size. Stress is
likely to be the underlying cause for your lack of good embryos, but
there are so many factors at play here, you really must provide some
more info.

cosgood from odu.edu wrote:
> Hello! I know many labs using multi-tanks systems - we recently
> purchased ours from Aquatic Ecosystems. Unfortunately, our problems
> began almost as soon as we transfered our first, originally kept in
> stand alone glass aquaria, into their new homes. What we see is loss of
> embryo viability - the vast majority die within 12-24h after collection
> from a separate breeding tank.We think the problem is with the
> multi-tank unit - the water pH runs low (@5), we have have levels of
> ammonia and nitrates - and we see none of this problem with our
> individual tanks. So something to do with the multi tank unit, whether
> it's the pump system, the plastic used in the tanks or the reservior,
> no clue. Has anyone out there had similar problems? More importantly,
> how did you resolve your water quality issues? We've not had much luck
> in getting useful advice from Aquatic Ecosystems. I'm hoping the zfish
> community will be able to suggest some approaches we could try out.
> Resolving the pH problem is probably the simplest issue, but it is a
> puzzle that we don't see the problem in stand alone tanks!
> Thx for your time - Chris