ADVENTUROUS 12-month-old paint horse Castro survived a brush with death on Saturday after getting stuck in a disused water tank.

Castro is believed to fallen about 1.5-2m after stepping onto the tank on an Amamoor property.

The old fibreglass tank, which was full of water, disintegrated under the horse's weight.

Luckily Natalie King and her husband Glen, who run a small lime farm, had finished picking about midday when they noticed Castro had gone missing.

"We were lucky to get him out when we did," Mrs King said.

"We found him straight away and my husband went in to reassure Castro everything was going to be okay.

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"Then we called the fireys who came to assist.

"My husband was on his tippy toes. The fireys helped pump the water out and we had an excavator dig a big hole on the side to let the water out and to give Castro an exit point."

The rescue mission, which Mrs King described as "a very frightening ordeal" took four hours.

"S--- yeah, it was very scary," she said. "He didn't panic or cry for help, but you could tell he was happy to be out.

"He was a little bit wobbly but the vet assessed him and he's all right. If we'd found him a little later, it could've been a completely different story."

The tank has since been smashed to pieces.

"It was completely smashed up to release Castro but we were always going to get rid of it," she said.

Mrs King had nothing but praise for the fire and rescue personnel.

"I'd like to thank them for what they did and for helping Castro," she said.

"It was a big team effort and they did extremely well."