I have a 100 gal tank that I water 5 horses from. I'm thinking about taking a 30 gal plastic barrel cutting some openings around the bottom with screen across the openings. Putting barrel in horse tank and keeping minnows in barrel. This tank gets between 20 and 40 gal of well water added to it every day depending on weather. The Hotter it is the more water the horses drink and the more well water gets added. Do you guys think this sounds like it will work? Any ideas to improve survivability of minnows.