So my sister has a baby on the way in about a month, and the baby's room is nemo themed. I thought, you can't have a fish themed room without actual fish, so I'm going to be setting up a 19 gallon bow front in the room. Obviously it won't be saltwater tank because my sister knows nothing about fish and I'll only be there every one or two weeks to do water changes. There will be a light timer and food timer so that she doesn't have to do anything. I will also bring bloodworms every time I come for water changes. I just have some stocking questions since my tanks have been established for years since I was a kid and I don't remember anything at all about whether I had success keeping the new fish alive that many years ago. I showed her some fish and she likes guppies, platys, mollies, Dianos, plecos, gouramis, and pretty much any tetra. -My first question is which fish would be the most hardy and able to survive in such a young tank. I heard dianos are pretty hardy but I want to be sure because my goal is to have absolutely no deaths. I will be cycling the tank for at least two weeks before adding fish, and I'll be using bio material taken from one of my tanks that's already full of bacteria. After cycling, I plan on only starting with about 3 fish to 'test the waters'. -I've also never had mollies and from what I understand, they're brackish. I know people keep them in freshwater, but do they thrive in it? If not I'll just skip them and go with platys. -I've avoided livebearers for years because I had them once and two turned into 100 in no time. I know many people just let them breed and either let the babies be eaten or sucked into the filter, but I want to be humane. So I plan on only getting males. Is it alright to have only males though? Or will they be very aggressive and miserable without mates? Years back when the last of my livebearers were dying out of old age and I only had a few males left, they were chasing each other around and trying to stick each other constantly. - Is 19 gallons acceptable for a pair of dwarf gouramis? I've never had gouramis, so I don't know their temperament. Sources online say they're peaceful, but I'd rather hear what you guys have to say. - Are the fish listed above high stress? My first tank was a 10 gallon a very long time ago and I remember the neons and cherry barbs would dart to the corner and hide as soon as I walked in the room. I know a 19 is a small tank and I want to make sure I choose fish that aren't too jumpy so they won't be stressed out all the time. - I've had bristlenose plecos, but not rubber lips which are what she wants. Will two rubber lips play along well in such a small tank? - I want to put in many live plants for hiding spots as well as to help keep nitrates in check. The tank will just have a regular single 18" bulb fixture on it, so I need some low light plant recommendations. -I've always had well water, so I've never had to worry about chlorine. But my sister has tap water, so I want to know if it's true that you can just leave a bucket of water sitting for a day and the chlorine will evaporate. If that's a myth, I can just bring buckets of my water for changes. I did test her tap water today and the test did not reveal any chlorine. That doesn't make much sense that city water would test negative for chlorine, so I'm questioning my test strips. Anyways... I know I've written a long list of questions, but I want to do this right. My goal is for the fish to never die of anything but old age, and I've been very successful the last decade with that. I'm here asking questions because I know that starting up a new tank often kills a few fish, and I want to avoid that at all costs. Thanks! -------- -Additional Question (edit): I want to bring a few of the plants from my main tank into the new tank, but I do have pond snails. They're not quite an issue anymore in my tank because the clown loaches are keeping the population in check, but I always see eggs on my plants and I don't want to transfer any to the new tank. I've heard about dipping the plants in a bleach solution, but are there any more specific ideas out there?