you can buy 1 already made that comes with a skimmer ect bu they are expensive. if your handy you can make 1 out of id say a 20 or 30 gallon long. you will have to get some plexi glass and make some bafels. you will still have to buy a skimmer, overflow box and return pump
i like to acclimate mine floating in the bag submerged in the tank due to temp fluctuations. Keeping it in ur tank will keep it stable. Water in a bucket can get cold (especially during winter n spring) causing stress to your specimen. Just my .02