my 125ltre tank has been up and running now for aboout 6 weeks . over the weekend just gone i lost 5 fish in the space of 2 days ,1 of them being my new siamese fighter. when i checked the water i found that the ammonia level had gone mad. ive since tried everything i can think off to get this level down but ive had no succes with any of the products that ive gone out to buy .the remaining of my fish are looking bad and i dont really dont want to loose anymore , can ne1 help plz