How often should you replace your test kit? I have one that is over twenty years old. The kits doesn't have an exp. date and I don't no how long they last.
About a month ago my platy gave birth to I would say about 30 fry, out of which 15 were stillborn.
Now there appears to be black round spots on their bellies. I don't know if that is a problem or not
I could use some help