After almost a month sinse the last fish died (had treated the water and tested it each week) yesterday we decided to add 2 more guppies to the tank, all seemed fine last night and then got up this morning to find a dead tetra (no sign of illness) and a bloated guppy, also another guppy on the bottom (but still alive), the new guppies seem fine and the one on the bottom swims around for a few minutes and then returns to the bottom. Obviously the one whos bloated will die.
Keeping guppies seems to getting tricky, we stared very well (not deaths for months) and now they seem to be droping like flies. Is this normal for guppies? should i just wait a few months and see what happens? not add any more fish? What do i do with the lonley tetra (as theres only one left)? will he be ok living alone in a tank of guppies?