Where they come from?
all over the world are different forms and specie
Where can you buy them from?
Not too many shops have Killis as not many shops know much about them and the choose to only hear the lesser things
How many types/species/colours are there?
Thousands.... and I do mean thousands
What they eat?
Prefer live foods as a lot of fish do but I feed mine mainly live white worm and frozen blood worm. Others feed flake but as I breed all the time, prefer livies and bloods
Ideal tank size?
I know of some that keep them in AG jars (overseas). I keep mine in 250 x 250 x 280high and 300 x 300 x 300 tanks. For my spare males, I keep them in 600 (L) x 300 x 300
pH and other water perimeters?
They are pretty easy to be honest... I do prefer mine to be kept at 6.5 to 7 though
Breeding - ease, where they lay their eggs (I guess they lay eggs?) etc
Not too many are hard to breed (gesh, I can breed them so they must be easy) and will breed in mops and peat. In general mop spawners hatch in 10 to 21 days but peat spawners can take up to 26 weeks. Just think, you put in some dirt (boiled peat) and a couple of weeks later remove the peat and dry it. 3 to 6 months down the track you wet the peat and fry arrive 3 to 48 hours later
Any other information that's pertinent to them?
ask away
Pics are always good
as TM said, look at the links. Here in NZ we have about 30 specie but at the moment, Im contacting some old breeders to see if they have any old peat around as the eggs can often hatch well over 3 years after they have been laid