The value in booking an audit before committing to any remedial work is that it separates guesswork from evidence. Instead of assuming a pond needs a new filter, a full clean-out or new planting, the audit identifies which of those, if any, is actually needed. That matters because pond problems often have more than one plausible cause. Cloudy water could be an algal bloom, a disturbed sediment layer, or a filter that has fallen behind on bio-media maturity, and each of those calls for a different response.
Pumps and filters do most of their work quietly and out of sight, which is exactly why owners benefit from knowing a few simple things to keep an eye on between professional visits, rather than only noticing a problem once the water has already turned.
Marginal and floating plants also go through their own autumn changes, with many dying back for winter, and trimming that dead growth back moderately, while leaving some in place for overwintering wildlife where the pond supports it, is part of a sensible autumn routine.
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None of this means every pond needs attention after every unusual spell of weather, most cope perfectly well, but weather extremes are exactly the kind of trigger that makes a documented, professional look worthwhile rather than waiting for a visible problem to appear months later. At around £150, a pond health audit is a proportionate way to get an honest answer on how the pond has actually fared, rather than guessing from a distance.
The core issue is straightforward. Leaves and other organic matter that sink to the pond floor and are left there begin to decompose, and that decomposition releases nutrients into the water. Those nutrients do not disappear over winter, they sit in the pond ready to feed algae growth as soon as light levels and temperature rise again in spring. A pond that goes into winter with a thick layer of decomposing leaf matter on its base is, in effect, setting itself up for a harder algae season the following year.