Just a few simple rules to keep your jumping / dressage arena in top condition, these will keep up the conditions of your warranty.

Keep surface an even depth using a leveller on a regular basis.

Every day, even when you are not using it. A simple 5 min. exercise. We supply a leveller with all our new arenas, so no excuses.

Compacting as suggested by Keith:

It is important that horses are not let loose or left unattended in your sand and rubber the arena. They can cause damage to your surface.
 
Remove all horse excrement as soon as possible from arena to prevent contamination of the sub - base.
 
It is bad practice to feed horses in the arena.
 
If necessary, in prolonged dry conditions your arena will need Watering.
 
If your arena is used for jumping, extra care is required where the horses are landing. Move jumps on a regular basis.
 
Level and Compact
 
When Lunging a strict maintenance regime is a must, as regular use in the same area will weaken the surface and void your warranty.
 
Lung correctly to avoid damage to your arena