They both have their tubes out and both tubes look different. Also I'm kinda laughing about them loving the tank setup because all I do is 15% weekly water changes and I don't even feed them live or frozen food all they get is omega one flakes twice a day. Although it has been setup for maybe a year so that might have something to do with it. Thanks for the help!
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I don't have an age of the fish. At the lfs he was listed as a medium angel so I'm guessing he's yonger. The two things I'm going by are the way he looks and his breeding tube looks different than my proven female.
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Looking at your tank pics, they are in a penthouse compared to what my breeders are in ( bare tanks but with natural scenery backgrounds) but because of the way I maintain the tanks, the fish are happy and breeding like rabbits.
As for the water change amount, in the old days, I was told that "If your tank needs more than a 10%-15% water change to maintain water quality, you are either overstocked or under filtered". So if your water quality is showing good numbers, you are on target with just that amount of water change.
As for age of the fish, I have never seen a sexually immature fish show "tube" so you can assume that since yours is, he is sexually mature. Aging fish by size is not a certain anymore. Many fish are genetically runts so they may be old enough to breed while still being smaller in size. Also, with many of today's lines being so overbred, shrinkage occurs due to this as well. I don't mean to be the bearer of bad news but these are the realities of today's home grown fish. Unless you are buying fish from a reputable breeder, there is no way of knowing just what is inside your fish.
Your next hurdle is fertility. If just one egg hatches, you have a fertile pair.
Next will be the results of the spawn. I currently have one pair that are producing huge spawns however, at least 25%-30% of every spawn are runts and rejects. As a reputable breeder, I am destroying these fish so their genetics don't get passed on. It's because of breeders NOT doing this culling that so many of today's fish are not healthy or as hearty as their wild counterparts. You may want to keep this in mind as you progress with your breeding. Genetic integrity is important to maintaining good quality fish.
Keep us posted with your progress.