I am currently in the process of rehoming my two, comet goldfish as I am leaving for college. I was presented two offers (I'm so grateful): 1. A covered outdoor pond with a 24 hour filter. It includes a goldfish, catfish, tilapia, and swordtails. "Probably 100-150 gallons if not more. Deepest part is probably close to 3 feet or more." 2nd option is- a temp. Pond that is 4ft deep around 300 gallons. No filter, but the owner said he switches it out every 2 weeks. "Inside the pond are regular goldfish, mosquito fish, and guppys." Please tell me your thoughts, and advise me on which is the better option for my fish!