I'm thinking of getting some clay (or clay powder mixed with sand/peat moss) and smushing it to the bottom of my tank as a 1st layer for super easy anchoring. Is there a reason people don't do this and use hard clay pebbles? Is it because it clouds the water? Even if you cap with sand or...

This morning I added enough FE to raise the amount of iron in my 55g tank to 1.0ppm. When I took a sample and tested it 10 hours after I added the Iron my levels were 0.07ppm. Before adding the Iron my levels were 0.04ppm. Could the added bentonite in my water be eating up the Iron I am...