Whilst not wishing to disagree with the thrust of this argument, I would tell you of my experiences with Barbel in still water.
I am a General Committee Member of The Verulam Angling Club; we own a section of the Upper River Lea in Hertfordshire, it is a narrow but fast flowing section that contained a number of Barbel which were thriving, breeding, growing and were generally in very good condition, we also owned a plot of land which came with the river when we purchased the freehold, the land was of no use for building as it was on the flood plain, so we decided to invest in our property and dig a lagoon by the side of the river, planning permission was sought and gained, we also gained permission from The EA to our plans, basically we planned a half to three quarter acre lake which would be joined to the river by a culvert, the intension was to produce habitat and security for juvenile fish and also to give ourselves some more swims (we are a business, and like any other, bums on seats would improve our productivity and give our members options for a days fishing).
The lake was dug and landscaped, we hoped for natural stocking from the river but we also introduced still water fish such as Carp and Tench.
This fishery has become a huge success, it is popular at all times of year (on this water we have to stick with the river season), it is now known as a good all round fishery, producing Dace to a pound and Roach to over 2 pounds (from both the river and the lagoon) , Tench and Carp grow to good sizes, as do the Chub, what has surprised us is that the Barbel have voted with their fins, being caught from both the lagoon and the river at all times of year, they have increased in both size and numbers, they breed quite happily on the fast shallows and also live quite happily in the lagoon where they seem to put on weight well.
I am not advocating stocking Barbel into still water but I have to say this fishery is a runaway success that is very popular with our members, so much so that we have applied for planning permission for two more lagoons on one of our other Lea fisheries and one on one of our Great Ouse fisheries all with the blessing of The EA.
We at The VAC learned many years ago, that if you get the habitat right, the long term outlook for a fishery is excellent, we spend a great deal of out disposable income on habitat improvement, and if you get it right the fish come along for free!
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