Hi Jonty,
I have only once trigger off a spawn from adding a cool water change, and I would say that the water I was putting in was about 5 or 6 degrees less than the normal tank temp.
I think you find it's a mixture of a cool water change and froozen foods (defroseted of course) that trigger off the spawning.
I'm very lucky with my bronze corys all they seem to need is plenty of food. They don't need a cool water change to start them off
Also, how would I look after the eggs? I have a spare tank, about 18l
The're two way that I know of:
1st: Put the breeding corys in the spare tank and try to get them to spawn in there, removing them after they spawn.
2nd: You collect the eggs, and stick them on the sides of the spare tank. I have found if you leave them about 15 mins after they have been
layed, the eggs harden a bit and you don't burst as many. All you do is roll your finger gentley on them till they stick too your finger and
roll them back on to the glass of your spare tank. If they lay them on a leaf it's even easier just take the whole leaf of the plant and put it
into the other tank.
I do the 2nd.
You will need in your spare tank a heater, sponge filter and an air stone, basically when you have the eggs keep the air stone going as this cerculates the water keeping the amount of eggs that gain fungi to a minimum. The warmer the water the quicker they hatch I have found, but
this may also mean that more will be afected to fungi.
HTH I'm sure Inch will be along to help to
luck.