how can i help my friends who recently lost everything to a fire?
Certainly. For picking mold off that pickle with her fingernail while parked next to a fire hydrant, I sentence Paris Hilton to 45 days.
Do you have to see the tiles? If not, I would find a garden store that sells pool supplies, and ask for pond liner. Here in the US, we use a heavy rubber/vinyl sheet for the bottom of ponds like this. It's thick, and waterproof. You could dig out around the outside of the existing box, put a piece of liner inside the box, and fold the extra over the outside. Then backfill on the outside to hold the liner in place. The stuff is dark grey or black, though, so you won't see any decorative tiles, but it WILL hold water.
lmao, yeah, at home by burning things in the oven.