RIP my mane 6 fish

Dear princess celestia, Yesterday I went and got some fish from a nearby pet store to keep me company in my room... however the next morning, I found they had went to fish heaven... I thought I had set the aquarium up ok for them, but I ended up messing up. I didn't wash the gravel before I put it in and I didn't wait the full amount of time before adding the fish... not to mention i added the chemicals to help the water be safe after I put them in, which pretty much poisoned them... but now I've learned and I'm going to try again to get it right next time I get fish. -Spartan