After someone mentioned checking your sealant for bubbles I found this bubble, it's not hollow I don't think...should I be concerned? It's a 90 gallon that's been set up for 2 and a half years, I know tanks are always a gamble but personally would this concern you? Thankyou
The inner seam is on the inside the tank with is your secondary seal, outer seam is between the 2 pieces of glass which is also called your primary seal