Am I overstocked ? water change regimen suggestion

  • toni-a
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toni-a replied the topic: Am I overstocked ? water change regimen suggestion

Nina_W wrote: sexing yellow labs at less than two inches? Wow! You must find out this guy's technique for me


You mean hiss exing isn't reliable ?
how do I sex yellow labs without venting them
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  • toni-a
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toni-a replied the topic: Am I overstocked ? water change regimen suggestion

Nina_W wrote: Why not get an idea from aqadvisor?
www.aqadvisor.com/

they tend to be horribly conservative on water change regimes, but it will give you some idea.

Checked they say with an oscar in ae 65 gallon I have 50% stocking and I need only 30% water change....not very reliable but surely it helped estimating
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Nina_W replied the topic: Am I overstocked ? water change regimen suggestion

toni-a wrote:

Nina_W wrote: sexing yellow labs at less than two inches? Wow! You must find out this guy's technique for me


You mean hiss exing isn't reliable ?
how do I sex yellow labs without venting them


Yes. His sexing is best guess at best (most probably just random guess). There's no accurate way to sex any monomorphic malawi mbuna before about two inches - not even venting. Some can be sexed by venting at an inch and a half, if you're very good at it. I'm not that good, but I also don't vent much.

Without venting them, there's only one way to really know:
you wait for them to breed and then you can see.

There's another way you can be pretty sure:
if one fish forces another fish to almost constantly hide in a vertical position behind the filter/in the top corners, both are males. This is a good guess, not a guarantee.

Females apparently have less black on their fins - this is only sometimes the case. I have some females that have just as much black on their fins as their male counterparts. I also have some females with less black. But this technique would misidentify about half my females. I'm not an exception here.

Males get 'bearding' - a subdominant male with have black on his cheeks - but this is only from above two inches and over, and, more importantly, some of my females do this too.

Males also grow much larger than females, especially if you let them breed. My males are between 3 and 4 inches big (I keep two with six females), my females a whole inch smaller. But again, this is only helpful far beyond the two inch mark.

That said, I'd love to know how he sexed them. Yellow labs, for me personally, are some of the hardest mbuna to sex.
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bassetman replied the topic: Am I overstocked ? water change regimen suggestion

this is just like people that sell "trios" of fronts at 2". it just cannot be done. even at 4-5" venting can be misleading. this is why you get a few extras and rehome/retank the odd ones.


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