sentences:  Llyn Conwy was at one time owned and looked after by Lord Penrhyn, who kept the lake well stocked.Over 2 days in 1880 a party caught 111 trout, and a month later some 119 were caught in the infant river Conwy between the lake and Ysbyty Ifan.In recent decades, Llyn Conwy has endured a decline in the number of people fishing there; the acidity of the water means that fish find it harder to live there, however a process of neutralization is underway there as limestone from the banks of the lake is slowly seeping into the water and levelling the pH levels so that gradually, over a process of ten years, the water will return to its former condition.