You are at The Krib ->Chemistry [E-mail]



  1. Artificial hatching
    by David Sanchez <barbax2/> (Mon, 21 Jun 1999)
  2. Conductivity as measured in MircoSiemans
    by R3K1/ (Tue, 22 Jun 1999)

Artificial hatching

by David Sanchez <barbax2/>
Date: Mon, 21 Jun 1999
To: apisto/

I talk to so many Hobbyists with the problem of
'parents eating eggs', 'eggs do not hatch' etc...
[Insert your own problem with eggs here] So often
artificialy hatching them only gives us meager results
anyway. The Important thing to look at is the
microsiemens or the counductivity of the water. This
is a superior way to measure the water quality as well
as the dissolved solids. Take a test of the
microsiemens of your source water and see how the
value changes as the water becomes more polluted with
urine, feces, nitrates, etc...  You will be surprised
how that value can change especialy in crowded tanks!
I have source water that starts out with a mirosiemens
of less then 10 and stays at about 30 in my breeding
tanks, in holding tanks where may have over a hundred
Apisto's this value can go up as high as 450! Many
Apisto eggs will simply not hatch under these extreme
conditions. I reccomend you invest in a counductivity
meter if this continues to be an issue.
For the eggs to hatch I could talk to you about The
proper pH and Hardness levels but these are common
knowledge, the real issue is the counductivity many
times! I would say that of the people I talk to who
can't get the eggs to hatch most of them, [as long as
we have the proper water parameters]would resolve
their problems by keeping these values in check. To
accomplish this we need to maintain a very high water
quality. I like to use good biological filtrat ion ie:
sponge filters and good regular water changes. 
 I can tell you this,egg eating ust is not an issue
for me and I hear of so many out there that struggle
with it. All of you out there that have been to my
fish room have always seen thick shoals of fry being
cared for by their parents all the time. It is not
magic we just need to watch the microsiemens.
Nothing against those that artificialy hatch the eggs
but for me I will compare my production to any that do
it artificialy. For me it's just to much work to do it
artificialy.99% of the time it is not the fish that
has the problem but us the hobbyist thats is lacking
in some area
Invest in a counductivity meter you will be surprised
at what you learn. Good luck to you

David Sanchez
Casselberry, FL
Do You Yahoo!?
Get your free address at

Conductivity as measured in MircoSiemans

by R3K1/
Date: Tue, 22 Jun 1999
To: apisto/

David Sanchez, thank you very much for your recent posting concerning 
conductivity: I couldn't agree with you more.  My experience with same has 
been exactly as you described!

I keep several Laetacara species all of which would spawn like clockwork, yet 
no fry.  The parents seemed to eat the eggs.  Upon closer examination, 
however, and after numerous "eaten" clutches of eggs, it appeared that the 
parents were merely eating those eggs that were not developing.  I was quite 
puzzled.  Why weren't the eggs developing?  My water chemistry is ideal for 
Laetacara genus species.  Finally, I invested in a conductivity meter and 
realized that my water measured circa 650 microsiemans due to the fertilizers 
and other additives I was using.

When I reduced the conductivity to more natural levels, I soon had to invest 
in several more tanks to house all of the new fry!

Randall Kohn
Chester, NJ

This is the apistogramma mailing list,
For instructions on how to subscribe or unsubscribe or get help,
Search for "Apistogramma Mailing List Archives"!

Up to Chemistry <- The Krib This page was last updated 25 December 1999