Well would you believe, I stopped the chasing in one foul swoop.
In one of my other tanks had a Nitrite spike from doing a fish-in rescape, course I disturebed the substrate to cause a spike, I never knew this could happen so I learned something new here.
Any way I thought I had cleared it by water changes and adding Prime but it returned again this morning.
I did another water change and again added Prime, after a good few hours the fish were still on the top so I investigated further only to find my 2 Gara had died, they were swimming about yesterday so the Nitrite must have got to them.
Any way I decided to take the remaining fish out and put them in my other tank, I had 8 x Buenos Aires and 4 x Red Eye Tetras, they had got fairly big so the Rams lost interest in the Hatchets.
I cleaned out the Tetra tank and plan to set it up again I may put the Tetras back or do you suggest I leave them?