No did not add anything to the tank left the tank a week went to the shop told them what I done got some pure aquarum that added to the filter then they said come back in a few day and they do some test for me
I have had them both in thr same tank befour but the neon tetras don't like hard water and as I found out the hard way they did not last long so I would stay away from them
There lots of fish to look at have a look at the barbs aswell but if you go with barbs they fin nippers so don' mix guppys and so on with them I had a tank full of barbs befour grate fish have a look at green barb, tiger barbs,golden barbs