About a month ago, I ordered some plants, one of which was an anubias nana "petite". The "petite" looked decent on arrival but had brown around the edges of all the leaves. it shed all of it's leaves within a day or two of arriving, and then my apple snails started eating the rhizome. In an attempt to save it from the snails, I put it in my 1 gallon tank. Last week, as I usually do since I put the anubias in the 1 gallon tank, I dumped out the water in the 1 gallon tank and put tank water from my bucket back into the 1 gallon (yep, 100% water change in the 1 gallon since there was only plants in there). When doing my weekly water change yesterday, I went to dump the water out of my 1 gallon tank but discovered something swimming around in it! Much to my surprise, I had a baby fish swimming around in my 1 gallon tank. It had been in there for a week without being fed, with no bubbler, with no water movement, and with algae starting to build up on the sides of the tank. When compared to the "new" fry, the baby fish in the 1 gallon was about twice as big. That's quite a bit of growth for a week's time, wouldn't you say? When I cleaned my "big" tank yesterday, I found baby fish in the bucket. This time, I purposefully fished some of the baby fish out of the bucket and put them in the 1 gallon tank in hopes they'd live.
What do y'all think? Will the baby fish survive in the 1 gallon tank or was the one baby surviving in there for a week just a fluke? If they get big enough, I have a 5 gallon tank I can set up and put them in.