I have a Fluval 13.5 gallon nano reef. I tend to have some hard growths on my glass and I especially like to scrape hard with a plastic cleaning head. I try to get all the edges. My question is how hard can I push/scrape the edge of the aquarium without fear that the silicone adhesive would somehow separate and cause a catastrophic failure? Are there any ratings on how much lbs the adhesives can take?