Increasing the family

L and I acquired 5 Cardinal Tetras to increase the Cardinal school in the tank, which has slowly been dwindling due to the ravages of time. We also bought 5 Golden Zebra Danios so that we can have a few fast moving fish swimming around the tank amongst the slowish Tetras.Hopefully they will also swim close to the surface as we feel that area of the tank is a bit empty at the moment.