I have clove polyps and xenia in my 6 gallon tank. The clove polyps have spreaded 4-5 polyps on the rockwork but at the same time the frag on the frag plug has melted/gotten smaller. Same with the xenia, the xenia has grown into the edge of the plug but the middle of it has disappeared. Nitrate at 0ppm Amm 0 Nitrite 0, are the nutrients too low for clove polyps and xenia? Duncan opening and fat, GSP has grown a lot, finger leather and toadstool are open and happyz