Wall-mounted Fish Tank Filter Box

给家里的鱼缸做了一个过滤用的盒子，在盒子里铺上了过滤棉（网上购买，便宜），进口段接近鱼缸水下中下部，采用了一个小的鱼缸水泵（网上购买 便宜），抽水能力比较强，把鱼缸抽到过滤棉后过滤并返回鱼缸，经过测试，过滤效果良好，浑水快速澄清。以前几天一换水，现在不换水，只是加水就可以了。I made a filter box for the fish tank at home and laid filter cotton (cheaply purchased online) in the box. The inlet section is close to the middle and lower part of the water in the fish tank. A small fish tank water pump is used, which has a strong pumping capacity. The water in the fish tank is pumped to the filter cotton for filtration and then returned to the fish tank. After testing, the filtration effect is good, and the muddy water is clarified quickly. In the past, I changed the water every few days, but now I just need to add water without changing it.