The pike does not have strict demands as to water quality. One can find them in lakes with clear water, brown water or clay colored water. The oxygen content, however, must not be under 3 ml/l, even though pike can manage for some time in water with an oxygen content of only 1-2 ml/l. Water’s acidity is also significant. In water with a pH below 4.2 pike cannot spawn. The pike can also live in brackish water. A fully grown pike can live in water with a salt content up to 1%, but for reproduction to succeed, the saltiness must be under 0.7 %.
Pike can also live in rivers with rather strong currents. Water temperature is not a significant factor for the pike’s prevalence as it thrives well in harsh inland climates in heights of 700 meters above sea level were the winter can be quite long.
The best waters to find pike are typically shallow and nutritionally rich with fertile vegetation. The vegetation in the water is important for the pike, both when spawning and for hiding places for its ambush attacks on prey.
Many of the nutrition rich lowland lakes which have a good pike population have inflow often from farms when they over-fertilize. The pike are able to withstand this but only to a certain limit. If the overflow from fertilizing becomes too strong, it adversely affects the pike’s reproduction.