lol, no need to worry about 'adding' silicone, they use enough. Just super sloppy work. Just inspect the frames closely and look for bubbles/air pockets in silicone work.Thanks for the replies and detailed info guys, much appreciated. I’ll have to have a good look at them, Most likely tomorrow. I may run a tight bead of silicone inside the tank myself just to double up. Hopefully all goes well.

