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Uploaded on Oct 26, 2010
Tree roots had grown into tank from the broken seals where the plastic pipes enter the tank, the roots were trying to grow into the pipe coming from the house. The roots would snag toilet paper and cause very slow draining and a possible toilet overflow.
I removed the roots and reseal pipe penetrations and also sealed the hatches to keep the rain water out. I also sprinkled a liberal amount of copper sulfate around the hatches and where the pipes enter the tank to keep the roots away.