Here, in some aquariums, after launching, a dark coating began to appear on the ground, snags and even on the lips of the filters. He began to read, and realized that these were diatoms. And they usually appear if the water contains a high content of silicates.
By themselves, silicates are not dangerous in the aquarium, but they greatly affect the appearance of diatoms. And since silicates can also be found in tap water, water changes cannot be removed from the aquarium. And the concentration of silicates in tap water can sometimes reach 40mg / l. They are safe for humans, and therefore there are no acceptable standards for drinking water. You can find out their concentration only with the help of tests, and get rid of them with the help of various methods, but about them a little later. To begin with, I decided to make sure of my assumptions and ordered a test for the presence of silicates in marine and freshwater aquariums.
I will not describe how to conduct the test itself. There is a very clear instruction in many languages. And very convenient system with a color scale for measurement.
So, for starters, I conducted a test of water from the aquarium, where diamate algae were found in large quantities. And as we see in the photo below, tests showed that the silicates in the aquarium are at > 3,00 mg / l, at an acceptable rate <1,00 mg / l in the marine aquarium and <2,00 mg / freshwater.
Since sometimes, silicon can be contained in the aquarium soil and emit silicates directly from there, for the purity of the experiment, I measured the values of tap water. And as we see in the next photo, the indicators in the water from the tap have become even higher! And therefore, no water changes in the aquarium will help us. And the chemical method using aluminum oxide from the American manufacturer will help Seachem. It removes not only silicates, but also phosphates (Read!), which also affect the growth of algae, not only diatoms, but also all others. It is made in the form of a filler for the filter in the form of small balls. I will write about how the level of silicates in the aquarium will change, in the next post, after the experiment is completed.
According to the forums, some fish and shrimp eagerly eat diatoms, so opponents of any chemistry in the aquarium can use them!
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