Też kiedyś miałem akwaria
Tu jest ciekawy artykuł odnośnie wędkowania w Parku Yellowstone
https://www.flyfishingyellowstonenationalpark.com/phs.htmlJest tam wpis odnośnie miernika pH, ale i również co do wpływu ph na pstrągi. Dla znających angielski, ewentualnie google translatorowców:
"Water below the normal pH scale of 7.0, almost always contains less aquatic insects than water that is average or on the high side such as that found in most spring creeks...Less aquatic insects generally means there is less food for the trout. Less food means the streams will have smaller trout."
"When the unpolluted rain and snow falls from the sky it is pure and free from minerals. It is slightly acidic and has a pH of approximately six. This
does not take into consideration acid rain which is a big factor in the pH level. As the water flows downhill, the pH will usually increase depending upon the type of rocks, sand, gravel, and organic material (such as leaves and vegetation) the water passes through. The pH of the headwater streams varies from region to region depending on the plants and the composition of the soil and rocks. Rain forest type terrain, such as is found in the Appalachian
Mountains, provides the water a different chemical composition than the more barren slopes of the Rocky Mountains. If the water passes through
volcanic rock, it is going to remain acidic much longer than water passing through a forest."
"Facts are where streams have a high pH value above 7.0, such as spring creeks, the trout grow to much larger sizes than they do in water with a low pH value.The different pH values of the water from its origin in the mountains to the larger streams or rivers in the valleys supports different groups of aquatic insects."