What is pH. pH is a measure of the hydorgen ion concentration of a solution. Solutions with a high concentration of hydrogen ions have a low pH and solutions with a low concentrations of H+ ions have a high pH. This may seem like a confusion way to express these reationships, and it is, until you understand what pH stands for.
Because they depend on sunlight for photosynthesis, diatoms generally live in the upper 200 meters of oceans and bodies of fresh water. Some species of diatoms simply float in the water currents near the surface.Others attach themselves to larger floating objects or to the sea floor.ecause they depend on sunlight for photosynthesis, diatoms generally live in the upper 200 meters of oceans and bodies of fresh water. Some species of diatoms simply float in the water currents near the surface.
Protists live in stagnant water, so do not search for them in flowing water, water from springs or tap water. Even in the free water of a lake or river there are few Protists and so in order to collect them you have to use special nets that concentrate them in a test tube. Instead, look for Protists close to the edge of ponds, puddles, fountains, vases with cut flowers, saucers, rainwater tanks, drains, etc.