Mystic is right, the more of them the more you see them!
I got four for my 4 foot, put them in and didnt see them for weeks. Then i would see one at a time, never more, so thought that i only had one left!
Now, and a few months have gone by, i found three, and they are almost always visable, and last night found the fourth :lol: so all still alive! and they have grown heaps
they are cool fish, get more and enjoy them!
plecs