I have a 75G that is a semi-NPT.
I have a 1/2" to 1" of plain topsoil capped with 1.5-2" of seachem sand. here is the thread for that tank's journal.
I can't seem to get the water to clear. At first I thought it was the tannins from the driftwood, but the plants continue to get covered with silt that I brush off each week when I do a water change.
I would leave the tank alone for a few weeks at a time, but the water won't clear up.
Any help or ideas would be appreciated.