wrote:
If it's like a dust coating then you can suck it out with a pond vac

Thanks for the info, particularly the advice above. To be honest, I
didn't know that such a thing as a pond vac existed, but it sound like
just the thing I need.

Does anyone know if these are available from tool hire shops? The
couple I've looked up near me (in Berkshire) don't seem to list them.

Cheers

Will

Look here Will..
http://www.bradshawsdirect.co.uk/Bra...MTCE_PONDVACS/
The fifteen quid one should do the job.
HTH
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ßôyþëtë