I acquired 3 wagtail platys a month ago and had the first fry about 10 days ago. We managed to move 6 to a separate tank before they were eaten and have 2 maybe 3 still alive. We haven't kept fish before so it's been a bit of a minefield. Our main tank isn't the right shape for a breeder box so I need to start filtering/oxygenating their water quickly. So far I have been topping it up with water from the main tank. Could anyone recommend a cheap solution for the baby fish tank please?