Foire aux questions

Eau douce Soins

Hornwort floating at the surface?

Hello, Concerning "name":Ceratophyllum demersum (very common) and Ceratophyllum submersum (rather uncommon) are known in the aquarium hobby. Concerning "roots":yes it will - growing...

Eau douce Invertébrés

Jumping animals on the water surface / Springtails (Collembola)

Hello, these for sure are springtails (Collembola). They are very common (for instance, they can also frequently be found in flowerpots) and entirely harmless. They even serve as...

Eau douce Soins

Is it normal that new plants discard leaves? / Is it necessary to remove rock wool?

Hello, Concerning "discard their leaves":this is indeed rather common. Quite a number of plants is grown emersed in the nurseries, i.e. with their leaves in the air (only the roots...

Eau douce Maladies

Is it normal that sera baktopur direct tablets dissolve rather slowly?

Hello, you need to be a bit patient here, the tablets dissolve rather slowly but entirely! This has technical reasons. You can dissolve them in a little water before use without...

Eau douce

Biofilm sur la surface

Bonjour, un tel biofilm (qui, d’ailleurs, peut également être verdâtre) se manifeste occasionnellement, en cas d’excès de matières organiques (protéines, glucides, etc.) servant de...

Eau douce Matériel technique

seramic calibration: Can you use pH 4 instead of pH 9?

Hello, no, the unit must be calibrated with the pH 9.2 solution mentioned in the instruction. Calibrations with solutions other than the mentioned ones will either not be possible at...

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