Keep the water clean. Also they make the tank look much prettier.
可保持水的清洁，其次，它们还可以使水缸看起来漂亮得多。
But does it really make that much difference how much water your horse drinks?
但它是否真的对你的马儿的饮水量产生那么大的差别？
For one thing they keep the water clean. Also they make the tank look much prettier.
一则它们可以使水保持清洁，再则它们可以使水箱看起来更漂亮。
For one thing they keep the water clean. Also they make the tank look much prettier.
一则它们可以使水保持清洁，再则它们可以使水箱看起来更漂亮。
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