Hey guys. i have just bought a rio 180 and am planning on using E.I on it however. For 2 weeks i will be away on holiday with my parents. For that 2 weeks i the water wont be changed but the fish will still be fed by our neighbour. what will happen if the tank is not does for 2 weeks after being set up for around 10 months on E.I and what will happen if the water is left for 2 weeks not 1like normal?