Jonny,
Nightmare mate. Sorry to hear about the deaths. You can relax regarding replacements though, the females are obviously gravid (pregnant) and as the female stores sperm you will still get plenty more drops. Even without males so you are almost 100% certain to be able to keep the colony going without buying more fish. If I were you I would leave them for the winter and worry about getting more stocks in the Spring.
Failing that, get yourself along to the next auction at the beginning of December in Redditch and see if you can pick some up there.
I recall that the nezzys at the auction went for less than £5 for a pair by the way.
Nightmare mate. Sorry to hear about the deaths. You can relax regarding replacements though, the females are obviously gravid (pregnant) and as the female stores sperm you will still get plenty more drops. Even without males so you are almost 100% certain to be able to keep the colony going without buying more fish. If I were you I would leave them for the winter and worry about getting more stocks in the Spring.
Failing that, get yourself along to the next auction at the beginning of December in Redditch and see if you can pick some up there.
I recall that the nezzys at the auction went for less than £5 for a pair by the way.