Adjust pH to 7.2 to 7.6. Wait 2 hours before adding algaecide. Mix the algaecide in a bucket of water and pour around the pool. Do not swim for 24 hours. Mix in a bucket of pool water and broadcast over the pool. Do not swim for 2 hours.
Mt. Asahidake (2,290 m), is the highest peak in Hokkaido. There is ropeway access from Asahidake Hot Springs to Sugatami Station at 1,600 m. From the station, a path leads to Sugatami Pond. The pond is surrounded by a primeval forest of Sakhalin spruce and Erman's birch.
View of Mt Rishiri and Rishiri Island from Rebun-to, Hokkaido, Japan. Map of Rishiri & Rebun in Hokkaido. Some of Rishiri's scenic highlights include Mt Rishiri and the lower peak of Mt Pon at 444m. From the summit of Mt Rishiri there are views of as Sakhalin, Rebun and the main island of Hokkaido.