I have a goup of 2 males and 2 females all around 10''12''14''15'' in my 300gal poly stock tub. When i first got them the males would chase after the females biting both of the females disk non stop even chucks off the disk are missing. I also walked in on them mating once. But for about a month know the males have been leaving the females alone and disk are almost fully healed from the bites. Do you guys think my females are pregnant? Thanks for any infos