My tank is cycled. My khulI loaches are healthy. I have a blackwater tank...and my betta is dead. I did water changes, added almond leaf...was I too late? What happened? Is it my tap water? If it was, the khulis are more sensitive...they should have gotten sick first. My ammonia read at .25, but it always has...it was ammonium at a ph of 6.5 - 6. What the heck happened? I did everything I could to save him and still lost him. My poor cali... rest in peace buddy.