Sad Day Is It Really Worth It

Guppies are notoriously weak fish these days. They get sick very easily and can often die for no apparent reason. A lot of experienced fish keepers won't have them for this reason. In order to create all those different tail shapes and colour patterns they have been intensively inbred, something known to cause genetic problems. And because there is such a demand for them, breeders use fish that are not in perfect health to breed from, so their offspring inherit these imperfections.
As long as the deaths are confined to just guppies, it suggests it is just because they are guppies.

As for the baby cory, it is common for a lot of baby fish to die - that's why fish have so many offspring. With just one baby it is hard to say if there was something wrong with it or if it was an infection. If the adult cories are OK, I would think it was something wrong with the baby.

But it is still upsetting to lose a fish you have nurtured from an egg 

I agree, a lot do get eaten. But do you find that even in nursery tanks where there is nothing to eat the fry, a number of fry do die anyway?

I agree, a lot do get eaten. But do you find that even in nursery tanks where there is nothing to eat the fry, a number of fry do die anyway?

Not really. Not unless the tank is very small. Fry "adjust their numbers" as they grow to stay within the stocking limits of the tank.

Fingers crossed for you and your fish.

Fingers crossed for your little guy 

@hampalong is probably the best person to answer this question, but it is my understanding that 'baby' parasites need to infect a fish or they die. Unless hampalong says different, I think the best thing might be to leave the tank running without occupants for a few weeks, just add ammonia to 1 ppm every 3 or 4 days to feed the bacteria.

Thank you hampalong and sue. The last time I added a fish was August . I did wonder if it was bacterial rather than worm because no other species were affected.

If it was an infection could that be stress and down to chasing each other. They are all males.

Sorry that I've not been able to be on the forum this week to respond to this thread until today, and I'm very sorry about your sad news. In the event that this happens to another fish, though, I would keep a bacterial infection in mind as a possibility. Many years ago, my goldfish looked to be at death's door, sitting on the bottom and with white poo hanging from him when he did try to get up to move; the only medication I had to hand was anti-bacterial infection treatment and it did result in a complete turnaround for him. A couple of other causes of clear, white stringy poo which I also realised over time were treating the tank with aquarium salt (which I assume you haven't done) and over-feeding on veggies and esp cucumber such as daily at the expense of dried food and which seemed to result in a string of white poo with what appeared to be air pockets in it (which I assume hasn't been the case either in your fish's case).

@Littlefish thank you & fcmf  i will bear that in mind for the future. I did treat him with aquarium salt but that was after he had the white poo. @ hampalong i did not realise they were so weak genetically but i wont be buying any again once these have passed on. i always thought guppys were quite hardy.

I am still learning' but learning fast thanks to everyone on here and it's very much appreciated.

Oh that's interesting but would they be ok with my honey gourami and can they mix with male guppys if I kept male endless. I suppose I could put them in my smaller tank if they won't eat baby shrimp which I am guessing they would.

What is the bioload for endless?