I wonder if anyone can help I have a 40ltr Nano tank running a Sunpod 70w 10K MH above it. I have recently purchased the clam shown in the picture - all good. Put it in the tank in the position shown - it looked happy was reponsive and opened up etc. Came down the next morning and it had fallen/moved to the position shown in the picture. I got a shock first thing in the morning - and in the semi darkness before going to work moved it back up to shelf. Came back later on that day to notice that when i moved it i think i had torn this stuff off - shown in the picture. I put the clam back in the position on shelf stuck a small piece of LR to make it feel a bit more secure behind it. Came down this morning and saw that it had again been knocked/moved to the same position on the bottom left. All of this is happening at night time only. It had a full day up on the shelf without any problems until where it had moved this morning. Im not sure what to do. Asked the clam supplier and he said not to worry about the foot or strands left behind - but that perhaps the clam had moved itself from the ledge. Im worried that it wont get enough light where it is. its a 20inch tall tank - with light 1nch above the top of the tank. The only real space I have in the tank is where it was on the shelf. Not sure what to do .