thanks folks. the camera is just a little samsung es57 10.2 mp but instead of zooming in I was around 6 inches from the tank.
currently in the tank are the RTBS and a mix of green tiger barbs and normal tiger barbs. No rainbows.
Only problem i;m having is that my pH is steadily creeping up. tap water is 7.4 but over the last 3 days it has crept up to 8.2 now. I have removed the rocks and am going to get a proper tank ornament cause i was advised that the rocks are sedimentary and can therefore increase pH. we shall see.
any other ideas. can't get ammonia below 0.25ppm though it isnt going above that.