You albino mollie's size may just be one of those genetic things, in which case you really probably don't want to use him as a breeder unless you are into dwarf strains of mollies. However fish will stunt (and if one is in the hobby long enough, some fry will show up which we don't have room to properly raise and they will only grow to runthood). If he was raised in too crowded or too small a tank, he probably carries the "regular" genes for size and his offspring will be fine. What sized tank was he raised in? Who was with him?

You say he breeds like crazy (though there is a huge difference between courting and trying and actually fathering fry. Do the fry show albino or some other indication that he was a parent? How do you know that the fry are his? As you probably know from skimming through Immediate Help here, female guppies can carry fry from a mating for up to six batches of fry. They often choose to mate with three males after each drop and that can make tracing parentage very hard to do.

You mentioned that he killed three other larger male mollies. Did you see him attacking healthy males? Was he "courting" them? That will sometimes happen in an all male mollie tank and is not likely to harm them. Or was he picking at already sick fish?

You have contributed a couple of good comments to Guppylog, but are new and haven't evidently sorted through all of the (sometimes confusing) FAQ, the first section of Immediate Help or caught comments tagged on to other "stunted" log submissions. There was one in the queue here when you got involved in GL. It had a favorable vote, partly because a lot of us vote a "mulligan" to a new member's first log submission. (And I will do that here too.) Yet I think that Scott Lockwood, the sight owner and guardian of the server, just bounced it over to the front page before it had enough votes to be sent there (unless the voting formula has been changed.)

It was a great question but not a log. As has been mentioned a lot of time:

"Like so many of us as first timers, you opted to submit a log, which according to the site software and FAQs is a major exploration of some aspect of the hobby. These Opuses will run from several hundred to several thousands words on Guppylog. On other Scoop sites, logs may be even longer!

Few of us read the instructions before making our first post. It seems to be typical human nature that we only read the instructions when all else fails. And there is usually am emergency we are preoccupied with, not the minutiae of a site.

The distinction between diaries and logs is a design issue of the software. We're not trying to put on airs.

I think you will agree that questions like yours make great diaries. :) And, because they aren't stuck in the queue and don't have to get voted upon, they get posted immediately on the "diary" and "everything" lists and very likely, get responded to sooner.

If your submission is voted down please don't take it personally. Sometimes people vote a "Mulligan" to first timers with pretty detailed offerings. Often they don't, but it is like calling balls or strikes, not an attack on the writer.

If a person responds to the questions asked of them in the comments that shows that they are really involved in the process and care what is said. "Engaged learning." like that often improves the "Mulligan vote" too." :)

All the best!