Where to start! Firstly I have managed a lake in the south of England for 22 years, I have plenty of first hand experience. It depends on the type of silt. Liming only works on organic matter, it won't work on non organic silt, there is nothing for bacteria to work on. But it does work on the former. Pumping silt is a massive task, behond most.I am skeptical of the claims made for it - but have no first hand observations of its effects upon waters i have fished
Thanks for the reference Keora - I've not seen that document before - an interesting read - as is the whole RiverRestorationCentre site the River Restoration Centre - worth having a look at to check over the status of projects planned/performed on your rivers.Here's an extract from an EA publication:
......It's on page 11 of a note on Fisheries Habitat Improvement.
Thanks Mick - I'll let the membership know that they are in for some hard mucky labour and not just barrowing in some 'miracle Siltex' - I wonder if there will be a better turn-out for work-parties - or will it be the usual "can't I've got a match"!As for crushed limestone, a few lorry loads of chalk would provide a similar effect though don't expect it to dissolve decades of silt and decaying vegetation, physical removal is the only answer Im afraid.
Did they find out what killed the fish? I ask because there are all sorts of reasons that can cause a fish kill.One year, after applying lime, some of the fish died