My dad didn't tell me he used the toothbrush he KNOWS is for animal tanks only for cleaning his tools. I was filling up Scuito's tank and I smelled it and it smelled like chemicals! GRRR.
I rinsed it out really really really really well. Put in Aquarium Salt and Water Conditioner (problem: i had to water down the conditioner until I could get more).
Him and Axel are looking okay (I cleaned Axel's tank first and didn't notice a smell). I'm just paranoid.