I know this may be a stupid question, but I have a 1 gallon tank with undergravel filter and light. I also have a pregnant guppy. Could they survive in this tank for a few weeks? It's the only tank I have that's not in use. I do have a new 5 gallon cycling. Also, she is laying on the rocks alot. She comes up to eat and swim some, but not much. I have a male who does the same thing, so I was wondering if this was a guppy thing or a pregnant thing? Thanks.