My stats are as followed nitrate 60, nitrite 20.0, hardness 6.0, alkalinity 5.5, ph 7, 20 litre tank 12 neon tetra, 2 angels, 2 gourami, Im currently cycleing my new 60 litre tank so i can move some fish out. i have been doing 25% water changes daily to bring my nitrate & nitrite levlels down...