Okay, so last night I went to the LFS and picked up six cardinal tetras. I acclimated them to my tank water with the drip method for 45 minutes, originally Eustice was curious about the new critters, but then stopped wandering around after the first 20 minutes. Once I put all six into the tank they immediately came into a shoal and everything was just peachy. This is where the mystery starts. I went to sleep last night around midnight and they were all present. But when I woke up like thrity minutes ago, I could only find three. So this begs the question, where did they other half go?!? Is it possible for them to jump? (Even though my tank is fully covered) Could Eustice have only been pretending to be passive with them just so he could eat them? (But, where would the remains go?) Did the other tetras eat them? (But wouldn't I find atleast some kind of remains again?) Or are they just hiding in all the plants? (Hopefully this one )
Usually when fish die they end up wedged under decor because the other fish are 'picking' at them and pushing them around. It's best to be sure they're not dead in there because three dead fish are going to give you a big ammonia spike. Start pulling out decor and stirring things up. I hope you find them!
Also, check the filter housing. I doubt it but sometimes fish swim up the filter and get into the housing.
I think he munched them. I never mix tetra with males...they have always eaten them.
Who am I? Well I am a Junior Member of the International Betta Congress and a breeder of white HMPKs, red dragon HMPKs, black/red dragon HMPKs, metallic multi HMPKs, blue masked HMPKs, and now multi color HMs. Soon to add black HMs. I will be showing in New Breeder class in fall of 2012.