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Ilasjön

southern acidified brown forest lake · 56°N
Real lakereal shorelinesources & method
clarity 1.4 mmax depth 12 mpH 4.7mesotrophic · humicstatus poorpaved road

Character of the water

Ilasjön lies in the south — a southern acidified brown forest lake. The tea-stained, humic water hides the bottom within an arm's length. In summer a thermocline settles around 6 m and splits the lake into two worlds. Acidification has thinned life down to the hardiest few.

The surroundings

The lake sits close to town with a road right up to it — easy to reach, but hard-fished and exposed to nutrient runoff from the buildings and fields all around.

A small but surprisingly deep pocket (12 m) with steep drops straight down from shore — the bottom falls away fast.

Permits & rules

Fishing permit required — Ilasjön FVOF. Day permit ~140 kr · annual permit ~700 kr.

  • Handheld tackle only. Respect the protected zones at the inlets and outlets.

Species in Ilasjön

perch predatory fish
typically ~22 cm · can reach 45 cm
The nutrient-rich water keeps perch moving constantly between the feeding grounds.

Fishing Ilasjön

perch sit at the top of the food chain in Ilasjön. The brown, humic water keeps visibility short — the fishing is more about vibration than sight.

The fishing here follows the water's own rhythm: dawn and dusk have their windows, fronts close and open them, and the season moves the fish. No two sessions at Ilasjön are alike.

General rules of thumb for this kind of water

  • Brown, humic water dampens the light — fishing can be good even in the middle of the day.
  • Acidified water yields few, hardy species.

The catch board

6 anglers · 12 catches
  1. 1Jukka Schmidtperch19 cm
  2. 2Heike Lindqvistperch19 cm
  3. 3Astrid Viklundperch18 cm
  4. 4Anna Nieminenperch18 cm
  5. 5Jukka Weberperch18 cm
  6. 6Jürgen Nilssonperch18 cm
The same water, for real