Raising anchovies and buying fish, fish tanks, heating rods, thermometers, ...?

Anchovies: 5-8 yuan, one pair is enough, because there will be a lot of breeding afterwards! Fish tank: 50㎝ ultra-white fish tank 70- 100 yuan, ordinary glass fish tank 40-60 yuan heating rod filter and filter material: heating rod 15-20 yuan, filter box and filter head (upper filter 10 watt) 25 yuan, thermometer 3 yuan, filter material/kloc.