- Joined
- Mar 26, 2017
- Messages
- 37,351
- Reaction score
- 211,006
Is a keystone best?@Katrina71 for arches, the easiest way is to build up a small structure or column, then glue a flatter or curved piece extending from the top of the structure.
Then you can either use a longer, slightly curved piece to rest against the portion that jets out from the the top of the structure.
For larger archways towards the top of your tank, you just have to break up the pieces of rock you buy until you get a nice curved piece that wedges between two columns real well.
It’s like winning the rock lottery.