https://www.meerwasserforum.info/fo...sea-beckenwechsel-qualitätsprobleme/?pageNo=2
So they are talking in this forum about the silicone being the problem. They say that red sea is using a 2k silicone that is fast curing, hence you have a faster production. They also talk about other companies using 1k silicone that forms an acetic net. But that takes 1day per mm to dry, so a tank with 15 mm glass takes 14 days before it can be moved.
They compare the big all in one producers like red sea, waterbox, aqueon, etc. that have only 2/3 years warranty to smaller german companies like brilliant, diamant that have 10 to 15 years warranty on leaking. And the difference is the silicone used.
They also mention there must be contributing factors for red sea tanks leaking much more often than tanks of the other big manufacturers.
By the way they claim that it affects G2 tanks as well.