I have a 8 inch common pleco in my 55 gallon tank, had him for about 6 months. I have noticed small what appear to be holes near the edges of the silicon where the sides of the tank meet up, there are quite a few of them and range from about .25mm to about 2mm in size. I think that the pleco is eating (rasping) on the silicon. I don't have any driftwood in the tank, just a large fake ship and plastic plants. Will the pleco eat the silicon enough to cause a leak? should i be worried? ever hear of anyone elses tank that had this problem? i have the option of giving the tank to a friend that has a 500g if i need to get rid of him. Advice please!