Frequently asked questions

Freshwater Care

pH value remains below 6.5 even after a water change

Hello, Concerning "R/O water":just a remark: the pH value of R/O water is not really important - it can vary strongly as it is not buffered. Furthermore, conventional pH electrodes...

Freshwater Invertebrates Care

Adjust pH value for shrimps

Hello, in case the pH value refers to "fresh" tap water you should simply wait, as it usually sinks in an aquarium (except if the carbonate hardness is very high). Otherwise I...

Freshwater Fish

Piranhas in an aquarium

Hello, I will split the answer into a number of different topics! Setup:a very large aquarium (at least 1,000 liters for 5 fish, preferably more) with sand bottom (the fish dig...

Freshwater Fish

Platies: How can I detect pregnancy, how often do the fish give birth?

Hello, the unborn fry are visible as a gravid spot (a dark spot diagonally above the anal fin). Just before birth, even the eyes of the fry can be seen through the skin of their...

Freshwater Fish

Male Platy is aggressive against members of its own kind

Hello, this is unfortunately normal with this gender ratio. Male Platies are actually aggressive against members of their own kind, especially if there are (as in this case) too few...


Sudden decrease of water quality and snail invasion

Hello, this sounds as if a dead animal (a fish or a larger snail?) is lying in the aquarium decomposing, which heavily pollutes the water. Generous (!) partial water changes are...

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