TDS testing pen

The TDS test pen can easily judge water quality in digital form and can be used repeatedly without calibration.

We first need to know the water conditions of the fish tank and the content of substances in it. Fish tanks in normal use include various fungi and microbial communities such as humic bacteria and nitrifying bacteria. This is determined by the small environment of the fish tank. We can roughly judge the quality of the fish tank through experience and the transparency of the water body. Is the ecology normal?
What really harms the organisms in Yuhong are ammonia, nitrite, nitrate and other toxic substances to organisms. Ammonia can be converted into nitrite and nitrate through microecology, but the content of these two salts cannot be determined by us. Judging intuitively. At this time, we can use the sub-TDS pen to make a rough judgment. We can choose a suitable time to take a baseline value according to the situation of our own tank. For example, after a large water change, we can measure a baseline TDS value and use This is used to measure the TDS value of the water in the tank. If it increases significantly, the water in the tank must have excessive nitrite and nitrate. At this time, the water can be changed based on the TDS value.