Update on the sticklebacks, i decided to introduce another male in the tank and that has 'galvanised' the original fish into action!...Both fish have now built nests and the Newbie has also attracted females to his, there are now young fry hatched from both so i must be doing something right lol.
I have taken all the large fish out now and the fry are growing bigger each week on the steady supply of Daphnia and Cyclops things that are in the water.

Jack.