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  1. TCMontium

    Nannostomus mortenthaleri sexing

    After I think, observe, research and post so much one after another (and probably annoy people with this thread popping up multiple times a day), I found this article, in which not just N. rubrocaudatus is described, but also many important information about other Nannostomus species is given...
  2. TCMontium

    Nannostomus mortenthaleri sexing

    The aforementioned fish that looked like a "female in male coloration" to me, but acted unlike a female, as far as my expectations for a female behavior goes:
  3. TCMontium

    Nannostomus mortenthaleri sexing

    Out of the 10 mortenthaleri I have seen here, only 1 fish had no visible white coloration on the dorsal fin. I also looked at the anal fin rays and they seemed quite thin for the brief time period I could observe them with the magnifying glass. The fish looks just like the one labeled as "female...
  4. TCMontium

    Nannostomus mortenthaleri sexing

    Thanks. I linked and talked about this site in a previous post, but I appriciate it.
  5. TCMontium

    Nannostomus mortenthaleri sexing

    As most of the time, I should have searched for videos too. This helps a lot, at least for a locality/morph of the species (if there are any to begin with). The females seem to have easily distinguishable non-round anal fins and little to no white coloration on the dorsal fin. I guess anything...
  6. TCMontium

    Nannostomus mortenthaleri sexing

    https://www.aqualog.de/blog/geschlechtsunterschiede-bei-nannostomus-mortenthaleri/ The photos of “young females” in this site shows fish with thin anal fin rays and a more sharp/pointy anal fins, while the “males” show widened anal fin rays and more rounded anal fins. But the photos of “female...
  7. TCMontium

    Nannostomus mortenthaleri sexing

    The 10 fish I can buy here are seven 4 cm fish and three 3-3,5 cm fish. So, they are adults and sub-adults. None of them are as intensely colored as most pictures on the internet, but some have darker and bigger red colored areas. Are you suggesting that even if all the fish are of similar...
  8. TCMontium

    Nannostomus mortenthaleri sexing

    Also, body shape seems to be uniform in all fish. Anal fin shape seems to also vary in males, I see very intensely colored fish with nearly sharp/pointy anal fins, not perfectly round like some other specimens. Coloration also does not seem to help, since some specimens I have seen with...
  9. TCMontium

    Nannostomus mortenthaleri sexing

    I would do so if the species did not have any sexual dimorphism or the fish wasn’t old enough to sex, but with mortenthaleri the real problem is not the money, but the absurd sex ratio of the sold fish. Almost all specimens sold in stores seem to be males and breeding reports are presumable...
  10. TCMontium

    Nannostomus mortenthaleri sexing

    Hello, I have read a few/lot of websites and book pages about Nannostomus mortenthaleri sexing and have seen some “male and female” photos too. Unfortunately, the information isn’t consistent. On Seriouslyfish website they say males should have white coloration on the dorsal fin, but no other...
  11. TCMontium

    Mystery Apisto

    Both are hongsloi. They could just be different captive strains.
  12. TCMontium

    Elizabethae aggression

    I advice you to make a bottle trap with food inside to catch the fish if the fish won‘t be in a small amount of water, in which ammonium poisoning can be a problem because of being just fed and very stressed. A simple example: https://www.nano-reef.com/forums/topic/249712-water-bottle-fish-trap/
  13. TCMontium

    Recommendations for sand?

    My preference has been JBL Sansibar White, but other white/yellowish sands with almost dust sized (well, many not THAT small, but less than a millimeter of diameter) particles should be fine too. The sand shouldn't be bubbling when it makes contact with strong acids. You can test that by...
  14. TCMontium

    Sitting and not eating after 2 day shipping

    A foam that doesn‘t have a significant chemical or biological effect in shipment. Simple, cheap, big pored, hard filter foam. I don‘t exactly know what a PolyFilter is, but if it decreases ammonia, ammonium, nitrites etc. concentration in the water, it probably would be useful in shipping. Or...
  15. TCMontium

    Sitting and not eating after 2 day shipping

    The foams (my mistake, they aren't called "sponge" in English) were just black and blue filter foams you can find for the cheapest price as 2-4 inch thick big pieces and you cut them to the shape you wish. Nothing special. I don't know why they were added either. I have seen oddly colored scales...
  16. TCMontium

    Sitting and not eating after 2 day shipping

    Thank you Mike. But I was asking for advice on fish that are becoming this way in shipment. He was hiding and not eating from the beginning and died after 5 days of arrival. There wasn’t weeks of time. The advices you gave up there are helpful in general when new fish arrive, but not in this...
  17. TCMontium

    Sitting and not eating after 2 day shipping

    Nevermind, the fish just died. What would you recommend though? If something like this happens again?
  18. TCMontium

    Sitting and not eating after 2 day shipping

    I ordered 1 male and 2 female adult Apistos. The fish were supposed to come in 24 hours or less, but they came in 48 hours in summer heat (outside, daytime was at least 33C/91F and nighttime was at most 16C/64F). All 3 were in the same bag, with 2-3 liters of water and some sponge cubes. The...
  19. TCMontium

    Poeciliocharx weitzmani

    That swimming behavior seems strange but one of my Taeniacara candidi that I moved to another big and decently decorated aquarium last week also is acting like that, swimming from side to side along the glass like a stressed Pengasius. I can’t figure out the reason either. Maybe it just...
  20. TCMontium

    Poeciliocharx weitzmani

    I keep them in a 55*35*40h cm aquarium. I had a male with 3 females in there for 7 months and they seem fine. I also have 2 pairs in a 80*35*40h aquarium and most of the time they don’t even show themselves. My fish likes to hide in/behind plants and decoration, whether they have other fish in...
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