Last Thursday I added 15 cardinals and this morning I only have two, some died on the descent to the back sump but I solved that from Saturday and anyway they just disappeared. This is not the first time I have seen this, in the LFS they have brought batches of 80-100 cardinals and they all die within 3-4 days, this has happened several times with them, I have no idea why it happens besides, they all ate well since they arrived.
That's too bad. You know, I have never had good luck with cardinals, which is why I always lean toward neons.
Looking good, Lalo!
WYite