Hi!
I've bred guppies in the past and I've had guppies for about 2-3 months now since I've started again. I have a 15 gallon tank with 2 females and one

beautiful male and they have been clearly mating. One of my females (grey snakeskin) started having a gravid spot like 32 days ago and she hasn't gotten any bigger and her gravid spot hasn't changed besides getting a little darker. I also have a blonde guppy that has had a faint gravid spot and has gotten huge within 16 days and now she's tiny again, what's wrong? All the guppies seem completely healthy and are very active.

Thanks soo much, it means a ton!!