Unfortunately disastrous product of jewel

Property me for my brand new jewel Aquarium two of these 3D rear panels appointed as the Aquarium has a large filter.
Optics is nothing premium and the price anyway but the jewel priced were not the cheapest. The crop is a disaster. With the utility knife it is by no means. The surface shatters and crumbles partially from. Is it possible to bring very difficult to measure.
State after 3Monaten:
- Plates are bent (no idea but not enough so as to bend whether by hiztze although 24 degrees is a plate!)
- The cleaning of algae infestation is impossible
- The jewel original silicone is unusable and peels off
- Plates are lighter so that when the silicone stops to keep as Diving literally out of the water the.
- All kinds of residues, dirt and snails crawl behind the walls where you can of course not putyen because it is glued

CONCLUSION: very high price for such a product. NOT BUY recommendation !!!! Waste of money !!!
Go back to adhesive film on the rear wall.