If not a veiltail then probably a delta or super delta. To be considered a halfmoon, the tail (caudal) has to reach 180* up and down when flared, and preferably with sharp edges. looking at his rays and the structure of his tail, I don't think he would make it.
Thank you for your compliment on my betta, I have found them here and there in different pet stores, mostly from local stores with smaller stock (and better care and selection) but I have gotten a couple from petsmart, though you really have to be careful and look closely at any potential betta. There were far more poor betta than good, but I usually hit them when they just get their order in (I think its more the lack of care that makes their health go downhill). However, an example of examination: I bought a baby double tail female without looking close enough. She has a spinal deformity and I am really kinda stalling the euthanasia as I've grown attached to the little girl =( it should be done though...
Where I will eventually get my stock online, for now, since I am just starting my hobby, I decided to go cheap in terms of fish (as my website mentions, I'm more interested in genetics and colors than money from pretty betta). Though each betta I purchase is vigorously checked over in every way for quality and form. And still, there are problems. The black lace half moon will probably not be bred as he has a spoon head and his anal fin is far too long. He looks to be a mild rose tail and may carry a trait that causes deformation in the scales. But he was one of my first betta, I know what to look for now. The steel blue half moon and the salamander delta tail are much better in form and fin. I just bred the steel blue HM yesterday, here's to hoping all goes well this time!
As for the type of your first male, I wouldn't be able to tell if he is a giant. Giants are typically 3"-4" without the tail if I'm recalling right, and I believe they can reach 7" but that's less common. Nowadays pet stores are calling regular large bettas "kings" when they are simply just a larger betta, causing confusion. He may just be a large plakat, which would make him larger than a regular sized betta. If you could get a photo of him next to your other fishie, that would help. But for your reference, here is a side by side comparison:
http://www.wasanbetta.net/j1/components ... 350b13.jpgWhen you paired your fish, did you condition them first? Some fish are just too aggressive to place together right away. I have some very aggressive betta that I condition a little slower than usual. In this case, I place the female in a "chimney" which is a smaller container with holes (to allow the hormones to spread through to the male) into the spawning tank. This way, the pair can see each other but cannot get to each other. The male will typically take this time to build his bubble nest before releaing the female. However, a couple of my males are a little more laid back. Not to say they do not chase the females, but they only chase them until they are out of their way. Regardless, breeding betta is going to result in a beat up female at the very least. They can take quite a beating, though their damaged fins will never truly grow back, only smooth out. My crowntail females fins are pretty ragged but they are in overall good health after breeding. But you do need to keep an eye on them during the process. If they become too picked on, reconditioning in a couple days is the best thing to do.
Albino bettas are pretty rare and I'm not entirely sure of their genetics but I think it must be recessive. I don't know if there needs to be a certain gene to produce it or if it is simply chance, which is how most albinos are produced if I'm recalling right. I don't think they breed true, so you probably wouldn't have gotten any anyways, at least not in the first spawn. Maybe if you continued down through you may end up with one but I'm really not surel either way, albinos are a weak strain and don't generally live very long, so breeding for them would really be a waste of time and money.
It sounds like the male was an egg-eater and there probably wasn't much you could do and does create a problem spawning. Luckily, the males I have bred so far have all proven to be outstanding dads. There is a process of artificial hatching, often used when a male dies or is an egg eater, but the hatch rate is way low. The father does a lot of work while there are still eggs. They constantly move them around, washing them of any bacteria in his mouth and eating any infertile eggs. Without dad the eggs are often overcome by bacteria and die. The male is usually kept in the tank until the fry are swimming horizontally (free swimming). At this point, the males job has increased and sometimes they will become frustrated and resort to eating some or even all of his fry. Sometimes, if the male is not able to be kept with the eggs, the female can be used. There are cases where the female will care for the eggs as the male would, though each case is different and more likely than not, she would eat them. I have an egg eating female and a female that helped the male pick up the eggs and placed them in the nest. Just depends on the female and the spawn.
Cardinal:
I used bettafix in the beginning and never had a problem with it and it healed the fins nicely. But I do recommend bettamax first. I wouldn't suggest long term treatment but it does help if used correctly.
Ah, I forgot to mention the fin curling! I noticed in but forgot about it. Cold water is definitely one factor, especially for crowntails. My fish room at home is kept at 75-80* but when I housed my old crowntails at my fiancés, I had a problem with fin curling. I heard sunlight can help straighten them out as well as warmer, softer water.
Food is also important. My adults get live food, usually blood worms and fruit flies. I need to pick up more frozen food. My fry eat micro worms and vinegar eels. I will be experimenting with baby brine shrimp but I don't like risking swim bladder disorder, which seems to be higher with these than with MW or VE. But ill give them a try and see how it turns out.
Totes, wonderful totes! Lol! I have a 20ish gallon for $8 I use as a grow out tank. I also use smaller tubs for the spawning tanks, they really work wonderfully and very cheap =)