For those concerned about humus release from soils, I have some exciting results. Recently, I watched an aquascaping tank setup sponsored by the Raleigh Aquarium Society. Demonstrator used STS (Safe T Sorb), a gravel-like clay. The advantages of STS became clear: inexpensive ($7 for 40 lb...

Having a tannin problem from a mopani wood something terrible desp. frequent water changes. The cloudiness really bothers my red claw crab. So, do water clarifiers such as Seachem Clarity Water Clarifier or Tetra water clarifier get rid of the tannins? Have used Tetra once yesterday and...