green water

hey, My Water Keeps Turing Green Like 3 Days After I Do A Water change. No any plants, not overload tank. some woods and sands. I changed water then lights off at night, and find green at early morning. just in 5-6 dark hours. After 2-3 days, it returns to normal without any med. or water...

So I found this amazing old live oak tree that had to have been laying dead for many years.. I grabbed my chainsaw and chewed off some huge chunks of the root of the tree, took them home and gave them a very through presssure-washing and set some of the wood in my 150 gal aquarium. Now my water...