Ok, so it is a tank that he built. Any warranty would come from his shop.
My opinion? Do not get water anywhere near that tank. 6 mm is no where near close enough to thick enough for that tank. With only the two middle braces you are in for some trouble. That should be at least 12 mm, maybe 14 for that long of a tank built in that style.
Once again, my opinion, but I would return that tank and find somewhere new to buy tanks from. Nothing wrong with buying tanks from stores that produce them themselves, but that seriously makes me nervous. If I were you, I'd return it and buy a big name brand tank. While there are still risks to leaks, it tends to be less likely. You'll also get a warranty.
My opinion? Do not get water anywhere near that tank. 6 mm is no where near close enough to thick enough for that tank. With only the two middle braces you are in for some trouble. That should be at least 12 mm, maybe 14 for that long of a tank built in that style.
Once again, my opinion, but I would return that tank and find somewhere new to buy tanks from. Nothing wrong with buying tanks from stores that produce them themselves, but that seriously makes me nervous. If I were you, I'd return it and buy a big name brand tank. While there are still risks to leaks, it tends to be less likely. You'll also get a warranty.
