I have had my tank up for about 6-8 months now, I have an API Freshwater testing kit and my ammonia and nitrites are 0 in my problem tank. The nitrate is at about 10. Temp is 78. I do pwc of about 25% once a week. The tank is a 20 gallon hex with 1 fake plant and some anubis? plants for my baby guppies to hide in. I have (had) 6 guppies, 3 baby angels (temp. for them until they got a little bigger), 2 dwarf platy's, 1 rubberlip pleco, 5 cories, and a few snails. Now my problem...
In the beginning of December I bought a guppy and added him to my tank. I noticed he had white lips, it wasn't cottony so I am not sure if it was disease or natural coloring on him. I treated for fungus and he seemed to be doing better, then he died about 1 week later. Three weeks later I have a baby angel (size of a dime) not eating. So I turn up the heat to about 82 and treat with a parasite med that was suggested by someone who raises angels.
Looked like he was getting better, then he died.
Next week...I have a healthy looking guppy start swimming upside down and is dead about 8 hours later. No marks on him, no discoloration, nothing.
Next week...I leave my house at 5 p.m. At 7:15 my mom calls and says my one angel, who was fine before I left at 5 because I fed them at that time and he was eating just fine, is flying all over the tank and acting weird. Came home at 11 p.m. and he is dead.
Everyone looks fine and healthy, but one by one they die. I have 3 other tanks and they are all fine, no problems at all. I am just sick, can't understand it. I loved my little angels and out of 3 I have only one left. I don't know if the guppy with the white lips had something, but why does everyone look healthy and die sporatically? My cories are doing just fine and I figured if something was wrong in the tank, they would be the first to be sick, but they are all doing great. Any ideas? suggestions? Thanks