plastic containers for saltwater aquarium usage

Question
I WOULD LIKE TO KNOW IF I COULD USE THE RUBBERMAID PLASTIC STORAGE CONTAINERS OR THE STERLITE PLASTIC CONTAINERS TO USE FOR A QUARANTINE AQUARIUM TO DOSE COPPER AND USE FOR A MONTH OR SO AS A QUARANTINE AQUARIUM AND WOULD IT BE SAFE TO USE  FOR MY SALTWATER AQUARIUM FISH.

Answer
Hi Alaica. I wouldn't trust using these types of containers for long term use with saltwater. Plastics can leach hazardous chemicals into water and with the corrosive power of salt and copper it may be worse. Acrylic or a poly-carbonate plastic is what is usually recommended for use in saltwater. While the rubber maid and sterlite are okay to hold saltwater for a short period of time, I can not recommend them as a good quarantine tank a place you will need to keep your fish for treatment for up to a month.