Size matters. Even with koi. Are small ones strong enough? Or are the large ones lower maintenance? Is the immune system sufficiently developed in the small ones? Well, both have advantages and disadvantages! In any event it is clear that younger animals sometimes have a less stable immune system and are therefore more vulnerable to disease. It is also more difficult to treat them and the diagnosis is more complicated. The larger animals can have greater problem in adapting to a new environment and may fall more often ill as a result of this. Their period of acclimatisation is much longer than with the small ones!
A word about cookies before we continue
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. We also use cookies for marketing purposes. 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. 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").
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. In addition, we use cookies for marketing purposes. You can determine at any time - even at a later date - which cookies you allow and which you do not (more on this under "Change settings").
Our data protection declaration tells you how we process personal data and what purposes we use the data processing for. tells you how we process personal data and what purposes we use the data processing for. Please confirm the use of all cookies by clicking "Accept" - and you're on your way.
Are you over 16 years old? Then confirm the use of all cookies with "Noticed" and you are ready to go.