I am new to all so please forgive typing ,spelling,and ignorance in fish keeping.I need some advice. I have 75 fw tank with fish in and here are my readings-ammonia 1.5 ,PH 7.6, no2 0,no3 15,AK 140,HD 100. I have been trying to cycle my tank for several weeks. I have lost several fish and have started doing daily water changes of 50% out of desperation.I'm not sure how much information to give so maybe you could ask me questions?