So I have a koi pond in my enty way, its a couple hundred gallons. Currently it just has a largemouth bass thats about 8-9 inches and some minnows that have somehow survived hiding in the rocks. I am in the process of draining it and re-doing some stuff for the spring. Anyways the only temporary home I have for the bass is a 30 gallon tank. He's been in it for about 3 days and I can already tell he is making a bunch of waste. He will only be in this tank for about a month but I am wondering how often I should do water changes? I dont want to over do it and stress him out. I was thinking once a week, about 25%. Or should I do it twice a week with smaller % water change? What do you guys think?