HLF

Does anyone know where to get a plastic container 3 feet long 3 feet wide for keeping fish?

I'm sure people at arofantics.com can easily recommend you a few sources to get them. They aren't going to be cheap though. You can look at this site for a price estimate: http://www.gardensingapore.com/water_fe ... asp?cat=27

actually plastic is not an ideal material for keeping fishes. unless it is appropriately engineered, which would come with a hefty price tag, having to go through profound processes. else, plastic can react with a lot of chemicals. hence it isn't exactly appropriate for keeping live fishes.