started a 75 gallon tank in dec.goal was to have angles and discus. I used to raise them 30 yrs. ago. started the tank with sime live bearers and tetras to cycle the tank. I then introduced 6 angles.it has been dowmhill ever since. Have lost $ 200.00 of fish. the only thing that lives in the tank is the 6 tetras & 1 catfish i started with. is there anything i can do or should just flush the tank . HELP LARRIE
PS. ALL MY WATER # ARE WHERE THEY 'RE SUPPOSE TO BE.