Setting off at first light across northern Great Lake in fog, he was surprised to see trout rising everywhere - to some duns but mainly to midges, in clouds and massed on the surface.

Boating 15 top trout, all browns except for a rainbow, he and friend found trolling with nylon lines rewarding.

Fly fishers on the western lakes were also happy with brownie numbers averaging a kilogram that they landed from Lake Flora last Sunday.

In weather pleasantly calm, they used nymphs and emergers from late morning until mid-afternoon to draw trout busy hunting stick caddis, mayfly nymphs, scud and tadpoles.

But with Huntsman Lake currently at 36 per cent of storage level, boaters are warned that this makes its ramp unusable for some outfits. Caution is needed by anyone using it.

Trout in Brumbys Creek and rivers linked downstream have benefited from water flows from Great Lake again boosted recently.

The Inland Fisheries Service has completed follow-up at Four Springs Lake of what remains of cumbungi, or bulrushes.

The service found no new infestations and bulrushes in only four of the nine sites previously treated.

Twenty stems were cut off below the surface and will be inspected next year or whenever new growths are reported.