bevs34
New Member
Started up a tank cycled it for 2 weeks had the water tested it was fine,put 10 neon tetras in 3 have disappeared mystery to me checked everywhere plants,filter everywhere they just vanished,I then added 5 tetras forgot what there called orange heads and black and white tail they are fine.On thursday added 5 guppies 3rd one died today all other fish are fine and the water test was ok,dont now what i did wrong.