glass tube. UV irradiation from gas discharge inside the tube stimulates it to emit visible light, while the glass tube does not allow UV to pass (otherwise special protection measures would be necessary!). Fluorescent tubes are menufactured in different lengths (wattages) and spectral compositions (light colors). They will perform optimally and live long only with temperatures between 20 - 25°C…
a re-infection. The above mentioned repeated tretment therefore indeed makes sense. The conventional aquarium light can remain switched on. The text about switching off lamps only refers to special UV lamps (so-called water clarifiers) that are operated in the filter circuit or along with it. Concerning "gasp for air": this is normal - Ichthyophthirius also affects the gills, therefore causing…
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