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...

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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 (220 nUS gal.) for 5 fish, preferably more) with sand bottom...

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Freshwater Care

Plants do not grow but dissolve

Hello, it is very likely that plant pathogens or the like can be excluded - but there are many possible causes:  High conductivity (above approx. 500 µS/cm) Due to the very high...

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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...

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Marine water

Pressure filters in saltwater?

Hello, yes, the pressure filters are suitable for this purpose without any restrictions. Here they are (maximum width, measured at the steel sealing ring / total height; all...

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