In addition, we use cookies for marketing purposes. The JBL website uses several types of cookies to provide you with full functionality and many services: Technical and functional cookies are absolutely necessary so that everything works when you visit this website.

You can determine at any time - even at a later date - which cookies you allow and which you do not allow (more on this under 'Change settings'). This ensures that we recognise you when you visit our extensive site again, that we can measure the success of our campaigns and that the personalisation cookies allow us to address you individually and directly, adapted to your needs - even outside our website. We also use cookies for marketing purposes. The JBL Homepage also uses several types of cookies to provide you with full functionality and many services: We require technical and functional cookies to ensure that everything works when you visit this website. The undergravel heating results in a slight warming of the substrate, but should by all means be complemented by a heater (JBL ProTemp s) for warm water fish. The transformer needs to be mounted in a well-ventilated and splash-proof place. The heating cable is silicone coated and works with an energy-efficient 10 W transformer and 12 V extra low safety voltage for hazard-free use. You can easily recognise the transition between the cold lead and the heating cable by a marking line on the cable. Bring the cold leads of the cable out of the aquarium and connect them to the transformer. Fasten the heating cable with the enclosed suction cups (slit suction cups).

Place the heating cable in even-sized loops on the cleaned bottom panel when beginning to set up the aquarium.

This creates a thermal water circulation, which washes the nutrition directly to the roots. The gentle undergravel heating causes the warm water to rise and the cold water, full of dissolved nutrients and minerals, sinks to the bottom. The plants absorb their food from these sources. Aquatic plants grow better in the wild when they have access to seeping nutrition sources.

Undergrave for windows instal free