I have two harems atm in one tank. Lyretails and bartletts.
I've had x3 different attempts with each set of harems. After much speculation and observation I feel the 3rd set for each appears to be much more successful then the first two attempts by running a different method of harem formation based off observations in the first two attempts.
In the first attempt I tried with 3 or more females, all of the same size, all at once for both harems. Most of the times when I tried purchasing females only, they all came around the same size so I didn't have much selection there.
Observations in first trial:
-If the dominance issue is a draw between two females both become males and that results in one taking out another unless the tank is large enough for both to have harems which I have read and seen.
-If the dominance issue is not resolved between the females (More then 2), many of them will become males and take out each other. I have read countless posts of people having all their females turn male.
-If you have a female turn male but is too passive, another male will arise from a female who does not feel the dominant pressure applied by the current male, obviously, resulting in a second male.
In the second attempt for a solid harem formation, I tried starting out with a large male with 2 females all at once.
Observations in 2nd trial:
-The male appears not to be established and shows no intentions on keeping a harem. Most of the times, hes more interested in keeping himself alive. I would hypothesize that a male who is aggressive and is eager to claim territory may not run into these problems, however in this case, this male appears not to claim territory or interested in forming a harem.
-He may appear to harass the females but does not show any attempt to keep a harem. He chases them around but not to make a harem, he actually does it to keep them away. If you watch them enough, you will know what kind of chase means, join me or get bullied or the chase that means get out of here! Alot of times, flaring is a good indicator of expression of dominance plus body tapping. Random chasing, without flaring and body tapping, around the tank appears not to be an indicator of trying to express dominance.
-These actions result in the remaining females to fight over each other who will be the leader of the two and henceforth the arising of a second male.
It generally takes about a month for the female to turn male from my experience. In my first two harems, most of them if not all have turned male within 2 months. I ended up selling and trading these out to others who were interested in them. Luckily there was a demand for males.
This third attempt is done with a female. I would hypothesize that starting with a larger male that is aggressive may result in similar outcomes but I would have to test this, however atm, I'm alittle tight on the budget from experimenting lol.
Third attempt trial and observations: Currently been running 6 months with this harem and they appear to have a strong harem formation.
1st: Start off with just one. A fairly large size specimen and female in this case. If you have the chance to, buy one that appears to be much more aggressive then the other females. Not to the point that she'd kill them but she means business and expresses dominance thru bodily displays.
2nd: Let the female adjust to the environment and become established with the territory first, 3 weeks. The second fish will clearly be unfamiliar with the territory.
3rd: After 3 weeks of being well conditioned and adjusted to the aquarium, I introduce the 2nd female, small and if possible, buy passive looking females, ones that prefer not to fight. Also since my female is in much better condition, I would hypothesize that she definitely has much more stamina to constantly fight for her position as the top dawg.
3rd: After another three weeks you will know who is top dawg when the female completely turns male and the female yields to him at all times.
4th: A third, once again a small female, is finally added at this point. It appears that with both a solid male figure and solid female figure, the third female yields quickly. Not only does the male show dominance, so does the 2nd female. However, if the second female goes too far, I have noticed the male comes quickly in to remind the 2nd female where she stands, 2nd and ONLY 2nd. This is what I would say forms the strong harem formations. There becomes a chain of dominance but the top dawg reminds number 2 on the chain at all times that hes the boss and not her but she reminds everyone below her shes the 2nd in command and so forth. The better the chain of dominance at the top dawg and number 2, the stronger the formation of the harem and the less likely hood of another male.
This is probably why some people can just toss a bunch in and get a harem, while others will continuously try and fail. You can get lucky on the chain of dominance or be unlucky and lose a couple hundred dollars.
Based off my observations and trials,if the chain of dominance is formed strongly between the first couple lyres, specifically #1 and #2, the harem becomes solid, if you have a poor chain of dominance at the top, you can expect to have multiple males arising.
To test my hypotheses from the first harem, I started a second harem with bartletts. This harem is about 4 months strong and appears to be very solid. I also notice the relationship between the top dawg and number 2 to be similar to the lyres. Number 2 will display dominance to the remaining females but is always reminded by the top dawg where she stands as well.
Based off what I observed, I tried a different strategy in the 3rd attempt and was successful and was able to reproduce the same results again with a different type of anthias. Will it always work, I do not know for sure. I would have to repeat those same procedures many many more times in order to say that based off my observations, this is the reason why so many people are unable to keep or produce a solid harem and why some are.
Please feel free to add your experiences or attempts to produce a solid harem.