Ah ok I didn't realise that it was only 10mm glass... blimey! Most of the rimless tanks I mentioned are done out of 15mm.
Wills
Juwel are more or less mass produced and it would not be economically viable to build the larger variants with more expensive glass or bracing since that would eat into their product profit margin and their product failure "write-off" margin.
Essentially Juwel can afford to have anything upto and possibly over 25% of their aquariums fail within the first 5 years. A fail rate of 25% is not going to hit them in the profit margins at all, whereas a 25% fail rate will severely damage a retailer - even the larger chain retailers will be wounded by that level of fail rating.
Warranties...on all items, not just aquariums...are rarely if ever worth the paper that they are written on. Foreign companies in the UK like Juwel must comply with UK warranty regulations (just as country has warranty regulations that every company must comply with). The wording on warranties is so loose, it is literally at the legal minimum and as a result that warranty can be shifted and still remain intact.......as an example British Telecom say they will pay £20 for extended downtime on their broadband, but in the tiny print, only if the problem exists over 30 consecutive days from day of reporting. Now we all know that it is unlikely that a fault will take over 30 days to sort out and that is what BT is banking on. A few years ago there was a huge furore over extended warranties issued by Currys for their big expensive appliances and TV's...again, they were worded to the minimum the UK law required but were very ambiguous and could be interpreted in many ways thus allowing Currys to dishonour claims at will.
You can use the credit card company, the bank or the loan company to fight on your behalf when things like this happen, but even then its rarely quick or easy going for the consumer. Generally a company will sit up and take notice if you threaten Small Claims Court....but not all will, there are some who are the bigger companies basically call your bluff, as GoodYear did to me and it cost them.
Sadly companies have a real problem with stepping up and admitting they got something wrong. At one time companies would always admit fault and correct things without a fight but not anymore...an example of that is Boeing...they used to be open and admit issues without needing to be pushed.....but as we saw with the B737MAX...it took several months and a congressional hearing for them to finally admit they got it wrong
Customer care and customer satisfaction are sadly things of the past where companies that have always enjoyed a heavy market share, they feel they do not need to prove themselves. Smaller companies, they do care and they do listen to their retailers and customers and they do take criticism on board and change things where neccessary.
Juwel will always be in profit, they do not need to worry about a few failed aquariums...its within that 25% fail rate "write-off" margin. They don't lose any sleep over it at all.