The pro is that is has more surface area for good BB to build up and this will better control the water parimeters. The cons is that after a year or 2 you might need to revamp the tank again because the soil might get clog up under the filter.
goody992828
钱不是问题!问题是。。。我没有钱。。。
花钱像拉屎一样简单,赚钱像吃屎一样难。。。
http://alvinchan80.blog.fc2.com
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