Just thought I'd do a general health check on a few bottles - most I bought with a view to drinking later so didnt check at point of purchase.

Two Springers I have I've noticed fairly heavy deposits.

A 12 year old cask strength (58.5%) lots of small dark particles and a dark hazy sediment have formed in the bottom of the bottle. Bottled in 2010 so distilled around 1997/98.

The two bottles of single cask (cask 789) distilled in 1997 and bottled for Oddbins - similar sediments.

Springbank only do a barrier filtration so I guess its possible for cask dusk and particles to get through?

The bottles weren't expensive and are for drinking - but should I be concerned with the contents?

If not, any idea's on decanting whisky!!!