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Hey there,

Does anyone know the pH values and how they relate to Kribensis fry?

I know lower means majority something and higher the other but I can't remember which is which for the life of me

Dave

Kribensis prefer a higher ph & so 7+ is good for them.


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Yes i'm aware of that, thanks Jason...

Let me explain further....

My Kribensis have breed and the fry are free swimming.

I Know that the pH of the tanks water has an effect on the Male:Female ratio of the fry.

A higher pH will yeild a majority of one sex fry and a lower pH will yeild a majority the other sex.

And for the life of me I can't remember which is high and which is low...

Just wondering if anyone here has retained this knowledge and is able to remind me

Thanks,
Dave

Last edited by mr_cichlid at 13-Aug-2005 18:20

They say that alkaline conditions will produce more males, acidic conditions will produce more females. I have never kept my juveniles long enough to confirm what they say

A higher pH will yeild a majority of one sex fry and a lower pH will yeild a majority the other sex

I thought that was temperature difference not pH

Anyway...I have had kribs spawn in a pH of 7.6...I lost my female somehow after the eggs were layed and the male never watch over them and sort of kept to himself for the rest of the time owning him.

Kribs are really easy to breed and usually breed from about a pH of 7-8.

[edit]
oops, didn't see what you said

I thought it was male is higher (temp or pH I really son't remember) and female is lower...

Sorry I tihnk I should read all of the posts and the poster even before posting my own >.<

Last edited by Tetra Fan at 14-Aug-2005 14:43

Thanks for the help all

Houston and myself figured it out yesterday and it is higher for males and lower for females

Interesting how you can moderately control this though is it not?

Thanks again,

Dave

[TDS], moreso than pH, does seem to dictate the sex of said fish. Along the Niger, the soft water streams of upper blackwater rivers drain into the brackish marshes of the delta. There are distinct (in that they never meet) populations of kribs that live in both the fresh, softwater streams and the hard, brackish costal waters. Realistically, the pH difference between the two regions are minimal. What better way to ensure genetic diversity between two geographically separate populations? Intermingle, of course. It is no wonder that the species also thrives (albeit introduced) in Hawaii, where the water chemistry is much the same as native Cameroon and Nigeria.

EDIT: Thus, you can obtain a large population of one sex by keeping the fish in hard tap, or another by mixing the tap with RO 50/50.


Second edit: Kribs are actually more inclined to accept acidic conditions than alkalinic (remember, they are riverine fish, not from the rift lakes---african does not equate to alkaline). Hardness is a more important factor than pH.



Last edited by Cup_of_Lifenoodles at 14-Aug-2005 15:56

Last edited by Cup_of_Lifenoodles at 14-Aug-2005 15:58

Outstanding.
The people on this site never fail me, Thanks all