Hi, sorry for another stupid question, but I'm so worried! I am new with guppies and this is my first batch of fry. I have 4, maybe 5 fry and the mom all in the 10 gallon. I am on vacation visiting relatives over the summer, and so my mom is taking care of them. She says she thinks the fry are about 3-4 weeks old. But still very small. I was just wondering, I get home in 3 days and I have to change the water asap because my mom says the water is filthy but she won't change it. So I was wondering how I would do that. I wan't to just do a complete 100% water change because it is so dirty, it hasn't been changed in 2 monthes *Since I've been gone* and so what would you guys suggest. I read online that I should only do a 10% water change so it won't stress out the fry. But I don't know...I'm worried they will die from the filthy water. I also have ONE more question, sorry, I swear I have looked these questions up a thousand times, but couldn't find an answer. Anyways, I think my female guppy is sick *The mom* because lately my mom says she has been hanging out at the bottom a little more...should I be worried? Thanks for any advice!!! I could really use some!