i just planted an Iwagumi layout and have dwarf baby tears near the front !.... i use an eco complete and sand substrate . I feel though that i havent planted the tears completly right... some pieces floated up. I feel that i really try to shove it in to the substrate that they would be burried and die . Whats the best method or is the way i have it , which is the pieces gently on top / in the substrate ok ???