So I got a rimless fluval 20 gallon with a hang on filter of of craigslist I dont want to spend for a new tank when I have one. I just want make AIO filter for the back of my tank to go inside. I am currently waiting for the acrylic piece to come in the mail. But I currently have my two clown fish in those 5 gallon buckets with the filter and heater and wave. Will they be okay if i leave them inside the bucket for a couple if days while I work on the filter tank